Circuit for compensating for discontinuity of a noise cancelled

Details Circuit for compensating for discontinuity of a noise cancelled Circuit for compensating for discontinuity of a noise cancelled

1979-07-17

1981-12-08

Heyman, John S.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

328109, 328165, 455223, 455304, H03B 104, H04B 112

Patent

active

043050425

ABSTRACT:
In order to reduce a discontinuity resulting from noise cancellation in an output signal of a noise canceller, particularly in lower-frequency components, a compensator (10) for use in, for example, a radio receiver, comprises two amplifiers (21, 22) for amplifying an input signal in which one or more noise pulses may be superposed. One of the amplifier output signals is given a delay relative to the other. Supplied with a noise detection signal, gates (26, 27) interrupts the amplifier output signals to cancel the noise pulse that substantially simultaneously appears in the both signals. A combination of capacitors (31-33) superposes one of the noise-cancelled signal on the other during presence of the noise pulse to provide an output signal in which the discontinuity is compensated for.

REFERENCES:
patent: 3231823 (1966-01-01), Garfield et al.
patent: 3588705 (1971-06-01), Paine
patent: 4114105 (1978-09-01), Duncan
patent: 4143333 (1979-03-01), Jacobsen et al.
patent: 4156202 (1979-05-01), Takahashi

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