add gnd shield
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65adac2bd5
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246
inductor_2
246
inductor_2
@ -46,6 +46,23 @@ debug = nil
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(multVect vect 1.0/(lenVect vect))
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)
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; multiplies a point p with a 2x2 matrix m
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(defun matmult (m p)
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result = list()
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for(j 1 2
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temp = 0
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for(i 1 2
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a = nthelem(j nthelem(i m))
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b = nthelem(i p)
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temp += a*b
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)
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result = append(result list(temp))
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)
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result
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)
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; DRAWING HELPER FUNCTIONS
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; creates a pin using database functions
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; and a corresponding net with name name
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@ -80,7 +97,8 @@ debug = nil
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(defun ind_createEnd (id start w dir)
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(output "[createEnd] start=%P dir=%P\n", start, dir)
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(let
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(center points left right up)
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(center points left right up viaDef)
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viaDef = (techFindViaDefByName (techGetTechFile id) "TM2_TM1")
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center = (addVect start (multVect dir (snap -w/2)))
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left = (addVect center (multVect dir (snap -w/2)))
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right = (addVect center (multVect dir (snap w/2)))
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@ -93,12 +111,34 @@ debug = nil
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(addVect left (invVect up))
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)
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(ind_createPin
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/*(dbCreateVia
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id
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viaDef
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(addVect center (multVect dir -w))
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"R0"
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list(
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list("cutWidth" (snap w-0.6))
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list("cutHeight" (snap w-0.6))
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)
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)*/
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; create underpass
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/*(dbCreatePathSeg
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id
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underpassLayer
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(addVect center (multVect dir -w))
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(addVect (addVect center (multVect dir -w)) (multVect up -20))
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w*2
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"extend"
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"extend"
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)*/
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/*(ind_createPin
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id
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"inner"
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points
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list("TopMetal2" "drawing")
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)
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)*/
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)
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)
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@ -113,12 +153,12 @@ debug = nil
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(addVect center width:(-width))
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(addVect center (-width):(-width))
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)
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(ind_createPin
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/*(ind_createPin
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id
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"outer"
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points
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list("TopMetal2" "drawing")
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)
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)*/
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)
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; creates one segment of the inductor and calls itself recursively to complete
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@ -209,6 +249,171 @@ debug = nil
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) ; when
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)
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defun(ind_gndshield (r width pitch gap window)
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(output "draw gnd shield with r=%L and w=%L\n", r, width)
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r2 = r + width
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m = 1/tan(mconst.PI/nseg)
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segw = 2*r/m
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pitch += width
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(defun iszero (x)
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abs(x) < 1/mfgGrid
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)
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(defun sign (x)
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(if iszero(x)
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then 0
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else
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(if (x > 0)
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then 1
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else -1
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)
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)
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)
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(defun cleanup (vect)
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(sign car(vect)):(sign cadr(vect))
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)
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for(n 0 nseg-1
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angle = mconst.PI*2/nseg * n
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rotmat = list(
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list(cos(angle) -sin(angle))
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list(sin(angle) cos(angle))
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)
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w1 = width
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w = w1
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(when ((mod n 2) == 1)
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w2 = w1*sqrt(2)
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w= w2
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)
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w1 = (snap w1)
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w2 = (snap w2)
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w = (snap w)
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; contact_ring = append(contact_ring list(list(r2*cos(angle-mconst.PI/nseg) r2*sin(angle-mconst.PI/nseg))))
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for(y 0 floor(segw/(2*pitch))
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yr = (snap y*pitch)
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a = (snap min(yr*m + gap, r))
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l = (r-a)
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(when ((mod n 2) == 1)
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l /= sqrt(2)
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)
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l = (snap l)
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dir = (cleanup matmult(rotmat 0:-1))
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(output "%P\n", dir)
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start = matmult(rotmat yr:r)
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start = (floor((car start)*50.0)/50.0):(floor((cadr start)*50.0)/50.0)
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end = (addVect start (multVect dir l))
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(dbCreatePathSeg
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id
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gndshield_layer
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start
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end
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w
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"truncate"
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"truncate"
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)
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when(y != 0
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start = -car(start):cadr(start)
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end = -car(end):cadr(end)
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dbCreatePathSeg(
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id
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gndshield_layer
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start
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end
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w
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"truncate"
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"truncate"
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)
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)
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) ; for
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a = (floor r/m*mfgGrid/2)/(0.5*mfgGrid)
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b = (snap r)
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start = 0:0
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end = 0:0
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(print n)
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(case n
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(0
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start = -a:b
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end = a:b
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)
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(1
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start = b:-a
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end = a:-b
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)
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(2
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start = b:-a
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end = b:a
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)
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(3
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start = a:b
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end = b:a
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)
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(4
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start = a:-b
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end = -a:-b
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)
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(5
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start = -a:-b
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end = -b:-a
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)
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(6
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start = -b:-a
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end = -b:a
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)
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(7
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start = -b:a
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end = (addVect -a:b -window:-window)
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)
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)
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; draw contact ring
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(apply 'dbCreatePathSeg
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id
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gndshield_layer
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start
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end
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w
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if(mod(n 2)==0
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then list(
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"truncate"
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"truncate"
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list(0 0)
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)
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else list(
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"custom"
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(if n==7 then "truncate" else "custom")
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list(
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w1/2
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(if n==7 then 0 else w1/2)
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list(w1/2 w1/2 w2/2 w1/2 w1/2 w2/2)
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)
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)
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)
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)
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)
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)
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)
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; uses ind_drawSegment to create a complete inductor with
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; the given specification
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defun(drawInductor (n r width pitch)
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@ -220,12 +425,9 @@ defun(drawInductor (n r width pitch)
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) ; when
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; get manufacturing grid spacing and set global accordingly
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mfgGrid=1/techGetMfgGridResolution(techGetTechFile(id))
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(output "using manufacturing grid of %L\n", mfgGrid)
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; set multiple globals
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inductorLayer = '("TopMetal2", "drawing")
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underpassLayer = '("TopMetal1", "drawing")
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output("generating inductor with r=%L, turns=%L, pitch=%L and width=%L\n" r n pitch width)
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whalv = snap(width/2)
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@ -248,6 +450,21 @@ defun(drawInductor (n r width pitch)
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(ind_drawSegment id n*nseg 0 -hl:r r)
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)
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(defun drawGndShield (r pitch width window)
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; setup gndshield
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id = pcCellView
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gndshield_layer = '("Metal1" "drawing")
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nseg = 8
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(ind_gndshield r pitch width width*2 (snap window))
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)
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(defun setup ()
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; get manufacturing grid spacing and set global accordingly
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mfgGrid=1/techGetMfgGridResolution(techGetTechFile(pcCellView))
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(output "using manufacturing grid of %L\n", mfgGrid)
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)
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; defines the inductor PCell
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(pcDefinePCell
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list( (ddGetObj "mmic14_inductors") "inductorPcell" "layout")
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@ -256,10 +473,19 @@ defun(drawInductor (n r width pitch)
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( radius "float" 100.0 )
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( width "float" 2.1 ); techGetSpacingRule(techGetTechFile(pcCellView) "minWidth" "TopMetal2" ))
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( pitch "float" 2.1 )
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( gndshield "boolean" nil )
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( gndpitch "float" 2.1 )
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( gndwidth "float" 2.1 )
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( gndoverlap "float" 3 )
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( gndwindow "float" 2.1 )
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)
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(let
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()
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drawInductor(turns radius width pitch)
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(setup)
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(drawInductor turns radius width pitch)
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(when gndshield
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(drawGndShield radius+gndoverlap gndwidth gndpitch gndwindow)
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)
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)
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)
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