Noise reduction circuit

Details Noise reduction circuit Noise reduction circuit

H - Electricity

04

B

340/72

H04B 15/00 (2006.01) G11B 20/00 (2006.01) H03G 9/02 (2006.01) H03G 11/00 (2006.01)

Patent

CA 1188384

NOISE REDUCTION CIRCUIT ABSTRACT OF THE DISCLOSURE In a noise reduction circuit comprising a combining circuit which generates a combined signal in response to signals supplied thereto, a main channel which supplies an information signal substantially unchanged to the combining circuit, and an auxiliary channel which receives the information signal and which supplies a modified information signal to the combining circuit for combining with the unchanged information signal, the auxiliary channel includes a high pass filter with a variable cut-off frequency which generates a filtered output signal in response to the information signal supplied thereto, a voltage-current converting circuit which converts the voltage level of the filtered output signal to a current and which supplies the current to the combining circuit, and an amplitude limiting circuit which limits the amplitude of the current supplied to the combining circuit.

417843

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