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A model is proposed for the inputoutput nonlinearity and the gain-frequency characteristic of a typical bipolar operational amplifier circuit. Using this model a closed-form expression is derived for the output signal of the operational amplifier circuit excited by a multisinusoidal input signal. Using this expression, the RFI demodulation in the operational amplifier circuit is predicted.
Inspec keywords: differential amplifiers; demodulation; radiofrequency interference; operational amplifiers; bipolar transistor circuits; linear network analysis
Other keywords:
Subjects: Linear network analysis and design; Amplifiers