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Simulators >> Circuit Simulators >> how simulate SC CMFB with HSPICE
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Message started by fxxjssc on Feb 21^st, 2006, 5:36pm

Title: how simulate SC CMFB with HSPICE
Post by fxxjssc on Feb 21^st, 2006, 5:36pm

hi all,
i am simulating differential op of ADC now, but you know ac analysis can not perform with sc in my design.
so have you got good idea beside with Spectre for i want to simulate it in Hspice
Thanks

Title: Re: how simulate SC CMFB with HSPICE
Post by Paul on Feb 22^nd, 2006, 12:39pm

Hi,

if you want to simulate the overall transfer function of the switched-capacitor block, you cannot obtain it from AC simulation in Hspice, only through PAC simulation in Spectre. If you want to run noise simulations, you can simulate separately the noise in the different switching phases and calculate the overall noise performance mathematically. If you want to simulate the amplifier behavior, you must replace parts of your switched capacitors by equivalent resistors to run Hspice AC simulation.

Hope this helps

Paul

Title: Re: how simulate SC CMFB with HSPICE
Post by xwcwc1234 on May 28^th, 2006, 7:10am

Can SpectreRF accept Hspice model file to run the PAC or PSS ? I can not get the Spectre model file from foundry , I have model file for Hspice only .

Title: Re: how simulate SC CMFB with HSPICE
Post by Mighty Mouse on May 28^th, 2006, 8:31pm

Yes, Spectre will accept HSpice model files.