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clock generation of 1Mhz using hspice

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antra_sax

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Hello,
I need 1Mhz complementary clock . i tried on hspice and i am getting 35 Mhz clock, can u please help me .code attached.
thanks in advance

Code: 
*************clock***********
v1 1 0 0.9v
M1 4 2 0 0 n1 L=120n W=280n
M2 2 4 0 0 n2 L=120n W=280n
M3 4 2 1 1 p1 L=120n W=980n
M4 2 4 1 1 p1 L=120n W=980n
.MODEL n1 NMOS LEVEL=54
.MODEL p1 PMOS LEVEL=54
L1 2 4 140u
C1 2 0 0.0879p
C2 4 0 0.0879p
.options post probe
.tran 10n 1u
.probe tran v(2) v(4)
.end
 
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