Loudness control circuit

Details Loudness control circuit Loudness control circuit

1980-10-23

1982-03-16

Britton, Howard

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

179 1D, 179 1VL, 333 28R, 333 28T, H03G 514, H04B 116

Patent

active

043205348

ABSTRACT:
In a loudness control circuit, the output DC voltage of a first variable DC voltage source is applied to a first amplifier for increasing volume to vary the gain of the latter, and to first and second differential amplifiers, while the output DC voltages of second and third variable DC sources are applied to the first and second differential amplifiers to provide difference voltages, which the applied to second and third tone control amplifiers which amplify the low and high frequency ranges, respectively, to control the gains thereof, so that the components of the sound in the low and high frequency ranges are boosted, thus achieving the weighting.

REFERENCES:
patent: 3849601 (1974-11-01), Goncharoff
patent: 4205274 (1980-05-01), Tsukada
patent: 4228402 (1980-10-01), Plummer
patent: 4262260 (1981-04-01), Tamura
patent: 4284965 (1981-08-01), Higashi

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