Multilevel amplitude modulation demodulator with DC drift compen

Details Multilevel amplitude modulation demodulator with DC drift compen Multilevel amplitude modulation demodulator with DC drift compen

1984-07-23

1985-11-12

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329146, 329166, 329167, 329168, 455309, 455312, H03D 106

Patent

active

045531021

ABSTRACT:
Multilevel baseband signals are applied to a full-wave rectifying section which produces first and second outputs. These outputs are applied to an analog-to-digital converting means which produces a plurality of recovered binary digital signals and an error signal. A controller is supplied with at least one recovered binary digital signal and the error signal, and produces two control signals which are fed to the full-wave rectifying section to compensate (a) first DC-drifts superimposed on the multilevel baseband signal and (b) second DC-drifts generated within the full-wave rectifying section itself.

REFERENCES:
patent: 3688205 (1972-08-01), Burger
patent: 4071829 (1978-01-01), Davis et al.
patent: 4250458 (1981-02-01), Richmond et al.

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