IBIS BIRD41.6 Series Switch Test Circuit

To IBIS Committee:

Below is a PSpice version of the Series Switch Model test circuit
sent out previously.

Bob Ross
Interconnectix

* TEST CASE FOR SERIES SWITCH MOS MODEL USING NMOSFET ONLY

* 1 3
* | |
* ____________
* o---/\/\/\---o o-----O____________)---o Open
* 10 ohms |___| TD = 0.5 nS
* | Z0 = 50 ohms
* Vcc
* Vh /----\
* / \
* 0 --/ \----- 0.1ns Rise and Fall
*
*
*
* Vds = Vd - Vs is used to change the sign of the current
* if Vs > Vd
*
* Is
* D ---> S
* 11 o---o--/\/\/\--o---o 13
* _|_ _|_
* C11 ___ ___ C13
* | |
* GND GND
*
*
*
*--------------------------------------------------------------------------
* TABLE OF Ids (2) vs Vs (1) for Vds = 0.5 V
*
.SUBCKT SER5 1 100 2
* | | |
* | | Current Source Output
* | Reference Voltage
* Output Sense Voltage
*--------------------------------------------------------------------------
GSW 2 100 TABLE {V(1)-V(100)} =
+ 0. 0
+ 8.0000e-01 0
+ 9.0000e-01 1.433e-04
+ 1.0000e+00 1.116e-03
+ 1.1000e+00 2.698e-03
+ 1.2000e+00 4.548e-03
+ 1.3000e+00 6.117e-03
+ 1.4000e+00 7.862e-03
+ 1.5000e+00 1.037e-02
+ 1.6000e+00 1.288e-02
+ 1.7000e+00 1.540e-02
+ 1.8000e+00 1.792e-02
+ 1.9000e+00 2.045e-02
+ 2.0000e+00 2.297e-02
+ 2.1000e+00 2.551e-02
+ 2.2000e+00 2.804e-02
+ 2.3000e+00 3.059e-02
+ 2.4000e+00 3.313e-02
+ 2.5000e+00 3.568e-02
+ 2.6000e+00 3.824e-02
+ 2.7000e+00 4.080e-02
+ 2.8000e+00 4.337e-02
+ 2.9000e+00 4.594e-02
+ 3.0000e+00 4.852e-02
+ 3.1000e+00 5.111e-02
+ 3.2000e+00 5.370e-02
+ 3.3000e+00 5.631e-02
+ 3.4000e+00 5.892e-02
+ 3.5000e+00 6.153e-02
+ 3.6000e+00 6.416e-02
+ 3.7000e+00 6.680e-02
+ 3.8000e+00 6.945e-02
+ 3.9000e+00 7.211e-02
+ 4.0000e+00 7.478e-02
+ 4.1000e+00 7.747e-02
+ 4.2000e+00 8.017e-02
+ 4.3000e+00 8.288e-02
+ 4.4000e+00 8.562e-02
+ 4.5000e+00 8.838e-02
+ 4.6000e+00 9.116e-02
+ 4.7000e+00 9.396e-02
+ 4.8000e+00 9.680e-02
+ 4.9000e+00 9.967e-02
+ 5.0000e+00 1.026e-01
.ENDS
*--------------------------------------------------------------------------
* TABLE OF Ids (2) vs Vs (1) for Vds = 1 V
*
.SUBCKT SER1 1 100 2
* | | |
* | | Current Source Output
* | Reference Voltage
* Output Sense Voltage
*--------------------------------------------------------------------------
GSW 2 100 TABLE {V(1)-V(100)} =
+ 0. 0
+ 8.0000e-01 0
+ 9.0000e-01 2.086e-04
+ 1.0000e+00 1.744e-03
+ 1.1000e+00 4.520e-03
+ 1.2000e+00 8.191e-03
+ 1.3000e+00 1.235e-02
+ 1.4000e+00 1.648e-02
+ 1.5000e+00 2.016e-02
+ 1.6000e+00 2.337e-02
* + 1.7000e+00 2.566e-02 Non-Monotonic Point
+ 1.8000e+00 2.397e-02
+ 1.9000e+00 2.900e-02
+ 2.0000e+00 3.405e-02
+ 2.1000e+00 3.910e-02
+ 2.2000e+00 4.417e-02
+ 2.3000e+00 4.924e-02
+ 2.4000e+00 5.432e-02
+ 2.5000e+00 5.940e-02
+ 2.6000e+00 6.450e-02
+ 2.7000e+00 6.961e-02
+ 2.8000e+00 7.473e-02
+ 2.9000e+00 7.986e-02
+ 3.0000e+00 8.501e-02
+ 3.1000e+00 9.016e-02
+ 3.2000e+00 9.533e-02
+ 3.3000e+00 1.005e-01
+ 3.4000e+00 1.057e-01
+ 3.5000e+00 1.109e-01
+ 3.6000e+00 1.161e-01
+ 3.7000e+00 1.214e-01
+ 3.8000e+00 1.267e-01
+ 3.9000e+00 1.319e-01
+ 4.0000e+00 1.373e-01
+ 4.1000e+00 1.426e-01
+ 4.2000e+00 1.479e-01
+ 4.3000e+00 1.533e-01
+ 4.4000e+00 1.587e-01
+ 4.5000e+00 1.642e-01
+ 4.6000e+00 1.697e-01
+ 4.7000e+00 1.752e-01
+ 4.8000e+00 1.808e-01
+ 4.9000e+00 1.864e-01
+ 5.0000e+00 1.920e-01
.ENDS
*--------------------------------------------------------------------------
* TABLE OF Ids (2) vs Vs (1) for Vds = 2 V
*
.SUBCKT SER2 1 100 2
* | | |
* | | Current Source Output
* | Reference Voltage
* Output Sense Voltage
*--------------------------------------------------------------------------
GSW 2 100 TABLE {V(1)-V(100)} =
+ 0. 0
+ 8.0000e-01 0
+ 9.0000e-01 2.991e-04
+ 1.0000e+00 2.581e-03
+ 1.1000e+00 6.944e-03
+ 1.2000e+00 1.318e-02
+ 1.3000e+00 2.107e-02
+ 1.4000e+00 3.036e-02
+ 1.5000e+00 4.080e-02
+ 1.6000e+00 5.211e-02
+ 1.7000e+00 6.397e-02
+ 1.8000e+00 7.601e-02
+ 1.9000e+00 8.784e-02
+ 2.0000e+00 9.897e-02
+ 2.1000e+00 1.089e-01
+ 2.2000e+00 1.168e-01
+ 2.3000e+00 1.218e-01
+ 2.4000e+00 1.228e-01
+ 2.5000e+00 1.217e-01
+ 2.6000e+00 1.186e-01
+ 2.7000e+00 1.107e-01
+ 2.8000e+00 1.014e-01
+ 2.9000e+00 1.116e-01
+ 3.0000e+00 1.218e-01
+ 3.1000e+00 1.321e-01
+ 3.2000e+00 1.423e-01
+ 3.3000e+00 1.526e-01
+ 3.4000e+00 1.629e-01
+ 3.5000e+00 1.732e-01
+ 3.6000e+00 1.836e-01
+ 3.7000e+00 1.940e-01
+ 3.8000e+00 2.044e-01
+ 3.9000e+00 2.148e-01
+ 4.0000e+00 2.253e-01
+ 4.1000e+00 2.358e-01
+ 4.2000e+00 2.463e-01
+ 4.3000e+00 2.569e-01
+ 4.4000e+00 2.675e-01
+ 4.5000e+00 2.781e-01
+ 4.6000e+00 2.888e-01
+ 4.7000e+00 2.995e-01
+ 4.8000e+00 3.102e-01
+ 4.9000e+00 3.208e-01
+ 5.0000e+00 3.315e-01
.ENDS
*--------------------------------------------------------------------------
* TABLE OF DIODE
*
.SUBCKT DIODE 1 100 2
* | | |
* | | Current Source Output
* | Reference Voltage
* Output Sense Voltage
*--------------------------------------------------------------------------
GSW 2 100 TABLE {V(1)-V(100)} =
+-2.0000e+00 -6.158e+17
+-1.9000e+00 -1.697e+16
+-1.8000e+00 -4.679e+14
+-1.7000e+00 -1.290e+13
+-1.6000e+00 -3.556e+11
+-1.5000e+00 -9.802e+09
+-1.4000e+00 -2.702e+08
+-1.3000e+00 -7.449e+06
+-1.2000e+00 -2.053e+05
+-1.1000e+00 -5.660e+03
+-1.0000e+00 -1.560e+02
+-9.0000e-01 -4.308e+00
+-8.0000e-01 -1.221e-01
+-7.0000e-01 -4.315e-03
+-6.0000e-01 -1.715e-04
+-5.0000e-01 -4.959e-06
+-4.0000e-01 -1.373e-07
+-3.0000e-01 -4.075e-09
+-2.0000e-01 -3.044e-10
+-1.0000e-01 -1.030e-10
+ 0. 0
+ 5 0
.ENDS
*--------------------------------------------------------------------------

* POWER AND GND
V100 100 0 0
V199 199 100 5

***************************************************************************
* MOSFET FOR 1-3 CONNECTION USED FOR REF.

V95 5 199 0

MOS 1 5 3 100 NMOSFET W=1440U L=0.64U

* ADDITIONAL EFFECTIVE CAPACITANCE IN ACTUAL SWITCH MODEL
* C1 1 100 6P
* C3 3 100 6P

.OPTIONS TNOM=40.00
.MODEL NMOSFET NMOS LEVEL=3

* SOURCE AND LOAD FOR EDITING
R1 91 1 10
*
R3 3 100 50G
TL 3 100 9 100 Z0=50 TD=0.5N
R9 9 100 1G

***************************************************************************
* TABLE DRIVEN MODEL SIMULATION WITH 11-13 CONNECTION

* DRAIN TO SOURCE VOLTAGE (SIGN CONTROLS CURRENT FLOW DIRECTION)
EDS 34 100 VALUE = {V(11)-V(13)}
RDS 34 100 1G

* MIN OF SOURCE OR DRAIN BECOMES "Vs"
EMIN 38 100 VALUE = {(V(11)+V(13)-ABS(V(34)))/2}
RMIN 38 100 1G
EREL 39 100 VALUE = {V(199)-V(38)}
RREL 39 100 1G

* I1(Vs)
X1 39 100 35 SER1
V1 100 35 0

* I2(Vs)
X2 39 100 36 SER2
V2 100 36 0

* I5(Vs)
X5 39 100 37 SER5
V5 100 37 0

* SELECT G5LIN, G1LIN, OR G2LIN:

*** Using Vds = 0.5 V Linear Approximation
G5LIN 11 13 VALUE = {V(34)*I(V5)*2}

*** Using Vds = 1 V Linear Approximation
* G1LIN 11 13 VALUE = {V(34)*I(V1)}

*** Using Vds = 2 V Linear Approximation
* G2LIN 11 13 VALUE = {V(34)*I(V2)/2}

* INPUT AND OUTPUT CAPACITANCE WHICH MATCHES SPICE MODEL
* C11 11 100 6P
* C13 13 100 6P

* DRAIN/SOURCE TO SUBSTRATE PATHS (FROM MOSFET EXTRACTION)
XDIODE1 11 100 11 DIODE
XDIODE2 13 100 13 DIODE

* MODEL SOURCE AND LOAD FOR EDITING
R11 91 11 10
*
R13 13 100 50G
TL1 13 100 19 100 Z0=50 TD=.5N
R19 19 100 1G

***************************************************************************

* COMMON INPUT PULSE
VIN 91 100 PULSE 0 5 0 .1N .1N 2N 4N

.TEMP 50.
.TRAN .1N 4N 0 .01N
.PRINT TRAN V(1) V(11) V(3) V(13)
.PROBE

.END

 
Received on Wed May 28 11:12:35 1997