Envelope detector using balanced mixer

Details Envelope detector using balanced mixer Envelope detector using balanced mixer

1979-06-28

1981-12-22

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329164, 329192, 329204, 329206, H03D 110

Patent

active

043073476

ABSTRACT:
An envelope detector with an extended linear dynamic range. A first amplitude modulated carrier signal, which can be of an intermediate frequency, is supplied to a first input terminal of a mixer, preferably balanced. The said first signal is also amplified and limited to produce a second signal which is phase synchronized with the carrier signal of said first signal, and which is supplied to the local oscillator input terminal of the mixer. The mixer responds to said first and second signals to produce a substantially dc (baseband) output signal whose waveform is similar to the envelope of said first signal.

REFERENCES:
patent: 2227902 (1941-01-01), Hahnle
patent: 2797314 (1957-06-01), Eglin
patent: 2828414 (1958-03-01), Rieke
patent: 2881312 (1959-04-01), Ressler
patent: 3697685 (1972-10-01), Lunn
patent: 3796963 (1974-03-01), Balaban
patent: 3921073 (1975-11-01), Pexa
patent: 4163196 (1979-07-01), Hongu et al.

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