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"Standard parts" for rf amps?
jw\ wrote...
Agreed, John, 150 MHz is damned near DC for a lot of us, but as yet I have no answer from the "spice" folks for the 1 nf capacitor question. A lot of fancydancing but no answers. Spice, smice. You got good answers. Wake up, spice is just an engine to run your component models in circuits of your making. Once one gets beyond the "toy" level of using spice it becomes necessary to vet and complete the models of all your critical components, including parasitic circuit elements. Want a good RF capacitor model, you do well to make it yourself, from the manufacturer's data and info, and from your understanding of the part, aided by theory and bench measurements. Then vet your model with more bench measurements. Thinking about component leads and PCB wiring? Hey, you need to explicitly add all these into your circuit. Just don't blame any resulting shortcomings on "spice." -- Thanks, - Win |
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