lordfire
Member level 1
hspice sparameters s12
i wrote a program for LNA, but failed getting accurate s-parameter , only acquiring
accurate S22 parameter, why? following is the control program
X1 1 2 IMN
X2 2 3 4 LNA_CORE
X3 2 3 BIAS
X4 4 5 OMN
VIN IN1 IN2 AC 1
RS IN2 1 0
RL 5 0 500000000000
.NET V(5) VIN ROUT=50 RIN=50
.AC DEC 10 2G 6G
.PLOT AC S11(DB) S22(DB) S12(DB) S21(M)
.OP ALL
.END
S11, S12,S21 is too small ,far below designing , S22 is accurate
i wrote a program for LNA, but failed getting accurate s-parameter , only acquiring
accurate S22 parameter, why? following is the control program
X1 1 2 IMN
X2 2 3 4 LNA_CORE
X3 2 3 BIAS
X4 4 5 OMN
VIN IN1 IN2 AC 1
RS IN2 1 0
RL 5 0 500000000000
.NET V(5) VIN ROUT=50 RIN=50
.AC DEC 10 2G 6G
.PLOT AC S11(DB) S22(DB) S12(DB) S21(M)
.OP ALL
.END
S11, S12,S21 is too small ,far below designing , S22 is accurate