Demodulator circuit for chopper amplifier

Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...

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Details

324118, 324119, 329205R, 329206, 330 10, 363 45, G01R 1918, H02M 706, H03D 110

Patent

active

041885864

ABSTRACT:
In a demodulator circuit for a chopper amplifier including a rectifier and a smoothing filter having a capacitor, an impedance conversion circuit is connected to the output side terminal of the capacitor to ensure holding of the stored charges of the capacitor at each negative half-cycle of the amplitude-modulated AC signal applied to the demodulator circuit. A discharge circuit including a switching element is further provided for the capacitor and the discharge circuit is rendered conductive at each positive half-cycle of the amplitude-modulated AC signal which is also applied to a control terminal of the switching element.

REFERENCES:
patent: 3721891 (1973-03-01), Moses
patent: 3787755 (1974-01-01), Goldner
patent: 4067233 (1978-01-01), Obayashi et al.

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