Integrated I.sup.2 L circuit for superimposing audio-frequency e

Details Integrated I.sup.2 L circuit for superimposing audio-frequency e Integrated I.sup.2 L circuit for superimposing audio-frequency e

1979-12-07

1981-04-21

Witkowski, Stanley J.

Music

Instruments

84DIG7, 340365E, G10H 118

Patent

active

042625742

ABSTRACT:
An I.sup.2 L circuit for superimposing audio-frequency electrical signals in an electronic organ is provided. With each current unit of audio-frequency to be superimposed a double-collector I.sup.2 L transistor is associated, and each key is coordinated to an injector, the current of which is switched by said key. In addition to the collecting bars into which said current units are fed, there is provided a separate collecting bar into which the non-audio-frequency collector currents of double collector transistors are fed, each of which being coordinated to each injector. A bounce effect is avoided by subtracting the signal of the separate collecting bar from the signals on the other collecting bars.

REFERENCES:
patent: 3534144 (1970-10-01), Ring
patent: 3816826 (1974-06-01), Masuda et al.
patent: 4229731 (1980-10-01), Holzmann
Funk-Technik (1972), No. 17, pp. 630-632; No. 19, pp. 695-699; No. 20, pp. 737-739 and 781-784.
Phillips Technical Review, 33, No. 3, (1973), pp. 76-85.
1972 IEEE International Solid-State Circuits Conference Digest of Technical Papers, pp. 90-93.

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