Constant power balance controls for stereophonic and quadraphoni

Details Constant power balance controls for stereophonic and quadraphoni Constant power balance controls for stereophonic and quadraphoni

1976-03-16

1977-12-13

Olms, Douglas W.

179 1G, 179 1VL, H04R 500

Patent

active

040630323

ABSTRACT:
Constant power balance control systems for stereophonic and quadraphonic sound systems are disclosed. Three different embodiments of the invention are disclosed. The first embodiment is a resistive network having a plurality of fixed resistors and a linear potentiometer. The second embodiment is a solid state circuit having four pairs of transistors. The transistors of each transistor pair are chosen to have characteristics such that for the same base-to-emitter voltage, the collector currents of the transistors of each pair satisfy a given ratio. The third embodiment is a combination of the first two embodiments. The third embodiment provides a comprehensive quadraphonic gain and balance control system.

REFERENCES:
patent: 3725583 (1973-04-01), Gunderson et al.
patent: 3769459 (1973-10-01), Niffenegger et al.
patent: 3849601 (1974-11-01), Goncharoff
patent: 3937885 (1976-02-01), Gay

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