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multi-stage PA matching? (Read 2340 times)

email_gz

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gaoz.mail@gmail.com

multi-stage PA matching?
Dec 12^th, 2007, 6:24pm

Hello all:
I have a question about multi-stage PA matching.All cascade amps are lumped parameter devices without transmission line. So should I must design impedance matching net from one inner amp stage to the next inner amp stage ? Also if I don't consider the inner stage impedance matching at all, Would it bring about stability problem?
Thanks:)

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Ian Junior Member Offline Posts: 27	Re: multi-stage PA matching? Reply #1 - Dec 17^th, 2007, 2:33am For on-chip design, the inter-stage impedance matching is probably not needed, as long as you could get the voltage swing you want. For the stability, it's important to decouple the gate of cascode transistor and supply with big capacitors. Also, take care of the ground bounce for the multi-stage design.
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email_gz Junior Member Offline Posts: 31 gaoz.mail@gmail.com	Re: multi-stage PA matching? Reply #2 - Dec 19^th, 2007, 5:58pm Helllo Ian: Thanks very much for your significant reply!
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