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Whats the definition of Maximum Oscillation Frequency fmax?

April 26, 2017definition electronics forum fmax forum edaboard Frequency maximum Oscillation

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Whats the definition of Maximum Oscillation Frequency fmax?

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Fmax is the frequency power gain drop to 0dB. Fmax can be bigger or smaller than Ft. Take bipolar transistor for example, rb (base resistance) play a critical role in Fmax while has no influence on Ft. rb has to be reduced to push up Fmax.