Pspice of a RC circuit in parallel

[Alex ACME]

Hello,

I'd like to monitor the Capacitance and the Resistance as a function
of DC bias when a sinusoidal voltage (that has a DC offset) is applied
at constant frequency on a RC circuit in parallel.

For example, for a circuit where R=1Kohm, C= 1nF, and the AC applied
bias has a certain DC offset (set to "0" here, see below), a fixed AC
voltage amplitude of 50 mV and a fixed frequency of 1KHz, I thought
of something like:

-------------------
Test circuit

R1 1 0 1000
C1 1 0 1e-9

VIN 1 0 SIN(0 50e-3 1e3)

..END

----------------

However, I don't know how to sweep the DC offset bias in the
sinusoidal voltage signal
(which is fixed to 0 in this example) and plot R and C vs. DC applied
bias. Does anyone would know how to do that? Should be very simple, (I
guess)
but I can't find examples in the Spice documentation that I have.

Thanks a lot

 

[John Larkin]

On Tue, 12 Oct 2010 08:42:12 -0700 (PDT), Alex ACME
<alexandre.mantovani.nardes@gmail.com> wrote:

Hello,

I'd like to monitor the Capacitance and the Resistance as a function
of DC bias when a sinusoidal voltage (that has a DC offset) is applied
at constant frequency on a RC circuit in parallel.

For example, for a circuit where R=1Kohm, C= 1nF, and the AC applied
bias has a certain DC offset (set to "0" here, see below), a fixed AC
voltage amplitude of 50 mV and a fixed frequency of 1KHz, I thought
of something like:

-------------------
Test circuit

R1 1 0 1000
C1 1 0 1e-9

VIN 1 0 SIN(0 50e-3 1e3)

.END

----------------

However, I don't know how to sweep the DC offset bias in the
sinusoidal voltage signal
(which is fixed to 0 in this example) and plot R and C vs. DC applied
bias. Does anyone would know how to do that? Should be very simple, (I
guess)
but I can't find examples in the Spice documentation that I have.

Thanks a lot

Neither R nor C will change as a function of DC bias. Some types
might, but not the ideal Spice parts.

John