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Jumper, Simulation MUX etc

itos

Hi,

How to I best implement a "jumper", MUX or switches for simulation time?

Often, I want to avoid creating new testbenches for every single purpose.

Example: I have an LO input and for certain simulations I want to DC couple a bias voltage through an inductor. But in other scenarios, this inductor should be disconnected. On a PCB, I can implement this with a 2x2 header that I jumper properly.

In Cadence so far I always manually remove the wire connection which is a pain.

What I envison is a MUX (or similar) with multiple inputs and based on a CDF parameter (that eventually I set in the ADE L window as design variable) one connection is routed through and the others disabled.

Thanks!

  • Andrew Beckett

    I'd use the sp1tswitch (or sp2tswitch etc) from analogLib. Change the parameter type to "string" and then blank out all the position parameters (i.e. don't leave them as "0") except for "Switch position". Enter the name of your design variable there - and the value of this would be 0 for "open", 1 for "close" - and if you've picked one of the multi-way switches, it could be 2, 3 etc.

    Regards,

    Andrew.

  • Marc Heise

    Hi,

    please try the switch, sp1tswitch ...sp4tswitch devices from the analogLib.
    For more information check the documentation.

    Kind regards,

    Marc

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