Norton_squaring_amplifier_with_hysteresis

Published:2009/7/17 4:52:00 Author:Jessie | From:SeekIC

This circuit shows one section of an LM3900 that is used to form a squaring amplifier for use with a variable-reluctance transducer. The circuit produces symmetrical hysteresis above and below the zero-output state (for noise immunity), and filters high-frequency input noise disturbances. With the values shown, the trip voltages are about ±150 mV, centered about the zero-output state of the transducer (at low frequencies where the low-pass filter is not attenuating the input signal). National Semiconductor Linear Applications Handbook, 1991 p 247



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