Noise eliminating system

Details Noise eliminating system Noise eliminating system

1979-08-21

1981-06-02

NG, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

358167, 328162, H04B 1500, H04B 110

Patent

active

042715350

ABSTRACT:
A noise eliminating system is disclosed for use in a radio receiver including a detector. The system comprises a differentiation circuit for differentiating the signal fed thereto from the detector, a clipper circuit for limiting the amplitude of the signal applied thereto from the differentiation circuit below a clipping level, a clipping level control circuit responsive to the strength of the electric field received in the receiver for varying the clipping level at a rate multiple of the electric field strength, means responsive to the electric field strength for selectively setting the rate at one of a plurality of values, and an integrating circuit for integrating signal fed thereto from the clipper circuit.

REFERENCES:
patent: 3102237 (1963-08-01), Elliott
patent: 3605029 (1971-09-01), Freedman
patent: 4087641 (1978-05-01), Sugai
patent: 4156202 (1979-05-01), Takahashi
patent: 4164758 (1979-08-01), Kowal

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