Stats

  • Locked Locked
  • Replies 7
  • Subscribers 126
  • Views 21923
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Time Variable Resistor

Ahmed Taha

Hi,

I have RC network, and I am running transient simulation. I would like to have one of network's resistors value to change over time.

I have input signal array to the network (Volts vs. time) and a corresponding resistor array values over time (ohm vs. time)

Is it possible to create such resistor with its value defined by that array of data over time in Cadence, Spectre?

Thanks.

Parents
  • Andrew Beckett

    A couple of ways. One is just to use a voltage-controlled-resistor. You can use the vccs component from analogLib for this - and change the "Type of Source" to "vcr". See "spectre -h vccs" at the UNIX prompt for details.

    Another way is to set the value of the resistor via a design variable, and then use the Dynamic Parameters option on the Transient analysis form in ADE to change the value at particular times. Note however that this is not continuous - it will do a step change in the parameter values at each time you specify. 

    Clearly this second approach isn't very physical - I'm guessing you're trying to model some voltage dependent resistor, and so I'd expect the first approach would be better.

    Kind Regards,

    Andrew

Reply
  • Andrew Beckett

    A couple of ways. One is just to use a voltage-controlled-resistor. You can use the vccs component from analogLib for this - and change the "Type of Source" to "vcr". See "spectre -h vccs" at the UNIX prompt for details.

    Another way is to set the value of the resistor via a design variable, and then use the Dynamic Parameters option on the Transient analysis form in ADE to change the value at particular times. Note however that this is not continuous - it will do a step change in the parameter values at each time you specify. 

    Clearly this second approach isn't very physical - I'm guessing you're trying to model some voltage dependent resistor, and so I'd expect the first approach would be better.

    Kind Regards,

    Andrew

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.