Digital to analog converter using matrix of current sources

Details Digital to analog converter using matrix of current sources Digital to analog converter using matrix of current sources

1981-04-29

1983-07-12

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1302

Patent

active

043933700

ABSTRACT:
A semiconductor circuit having an improved current switching function is disclosed. The circuit comprises at least one current switch unit including a current source, a current output node, a field effect transistor connected between the current output node and the current source, an inverting amplifier having an output supplied to a gate of the field effect transistor and an input connected to the junction point of the current source and the field effect transistor and means for controlling operation of the amplifier.

REFERENCES:
patent: 3217147 (1965-11-01), Chapman
patent: 3609661 (1971-09-01), Hennes
patent: 3823386 (1974-07-01), Gilbert
patent: 4024352 (1977-05-01), Mukaemachi
Schoeff "Digest of Technical Papers", 1979 IEEE International Solid-State Circuits Conf., Feb. 15, 1979, pp. 178-179, 292-293.
Danielsson "Digital Processes" 1979, pp. 133-140.

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