adc_bridge in Ngspice

Question

Why does the adc_bridge not work when we have an input DC value?
The plot for v(1) appears but v(cmp) is blank.

.model adc_buff adc_bridge(in_low=0.5 in_high=0.5)
v7 1 0 5
Aad1 [1][cmp] adc_buff
.control
tran 0.02u 7u
plot v(1)
plot v(cmp)
.endc
.end

Huisman · Accepted Answer · 2020-03-12 21:06:47Z

1

You should have posted the error message as well:

Unknown model type adc_bridge - ignored

That's the reason you don't see any output for node cmd.

Check the manual, chapter 12 of the manual

You will find that adc_bridge is a XSPICE extension.

And at the beginning at chapter 12, it reads:

To make use of the XSPICE extensions, you need to compile them in.

I've no experience with that, but hope you can continue from here.

answered Mar 12, 2020 at 18:55

Huisman

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\$\begingroup\$ I didn't encounter any error while compiling. Moreover the code works completely fine when I replace v7 with a pulse voltage. The problem arises only for a dc input. Thanks for replying! \$\endgroup\$
– dish
Commented Mar 13, 2020 at 5:05

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