Norton_low_frequency_mixer

Published:2009/7/25 1:26:00 Author:Jessie | From:SeekIC

This circuit shows a Norton used as a low-frequency mixer where two input frequencies produce a sum and difference frequency (in addition to other high-frequency components). The circuit has a gain of 10 and a low-pass single-pole filter (1 MΩ and 150 pF) with a comer frequency of 1 kHz. Relatively high frequencies can be applied at the inputs as long as the desired difference frequency is within the bandwidth capabilities of the amplifier and the RC low-pass filter. The difference frequency is filtered from the composite resulting waveform and is made available at the output.



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