gEDA-user: ngspice - switched capacitors

["nano schultz" <nano.schultz@xxxxxxxxxxxxxx>]

Hello,

I'm trying to simulate a switched-capacitor model, but however ngspice
can't recognize vswitch model. Or does ngspice have another name for
it ?

here is my spice file:
SWCAP.CIR - SWITCHED-CAPACITOR RESISTOR
*
V1	1	0	DC	5V
*
* SWITCHES AND CAP
S1A	1 2	10 0 	SW1
C1	2	0	1000PF IC=0V
S1B	2 3	11 0 	SW1
*
V2	3	0	DC	1V

*
* SWITCH CONTROL
VSA	10	0	PULSE(0V 5V 0US 0.1US 0.1US 5US 20US)
VSB	11	0	PULSE(0V 5V 10US 0.1US 0.1US 5US 20US)
*
.MODEL	SW1	VSWITCH(VOFF=0 VON=5 RON=100 ROFF=10MEG)

*
* ANALYSIS
.TRAN 	0.1US  100US
*
* VIEW RESULTS
.PROBE
.END

the erreur I'm getting with ngspice:
[..]
Circuit: SWCAP_RES.CIR - SWITCHED-CAPACITOR RESISTOR

Error on line 6 : s1a   1 2     10 0    sw1
        unable to find definition of model sw1 - default assumed
Error on line 8 : s1b   2 3     11 0    sw1
        unable to find definition of model sw1 - default assumed
Error on line 17 : .model       sw1     vswitch(voff=0 von=5 ron=100 roff=10meg)
       Unknown model type vswitch - ignored

nano


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