Automatic mixer apparatus

Details Automatic mixer apparatus Automatic mixer apparatus

1990-08-30

1992-09-15

Dwyer, James L.

Electrical audio signal processing systems and devices

With mixer

381 92, 381 59, 381107, H04B 100, H04R 300, H04R 2900, H03G 300

Patent

active

051484919

ABSTRACT:
An automatic mixer apparatus is described which comprises a plurality of channels each including a level detecting circuit, a comparator and a voltage control amplifier, a gain control circuit for controlling the gains of the voltage control amplifiers of the respective channels and a mixer circuit for mixing signals from the voltage control amplifiers. The level detecting circuit detects a level of an aural signal received at the corresponding channel and the comparator operates to compare the detected level from the detecting circuit and a reference level. When the detected level is higher than the reference level, the comparator outputs a comparison signal to the corresponding voltage control amplifier to turn on. The gain control circuit receives the comparison signals from the whole comparators and outputs a gain control signal to the respective voltage amplifiers whereby the gains thereof are controlled in accordance with the number of the comparison signals received at the gain control circuit.

REFERENCES:
patent: 4296278 (1981-10-01), Cullison
patent: 4489442 (1984-12-01), Anderson
patent: 4503554 (1985-03-01), Davis
patent: 4633495 (1986-12-01), Schotz
patent: 4852176 (1989-07-01), Truhe

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