Analog-to-digital converting circuit

Details Analog-to-digital converting circuit Analog-to-digital converting circuit

1981-12-01

1983-08-09

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347DA, H03K 1302

Patent

active

043981798

ABSTRACT:
An analog-to-digital converting circuit comprises an input, a clock signal circuit providing first and second clock signals having the same frequency but having a half-cycle phase difference therebetween; first and second analog-to-digital converting stages each having an input coupled to the converting circuit input for receiving an input analog signal, a control terminal for receiving a respective one of the first and second control clock signals, and an output providing an N-bit binary-coded digital signal representing the level of the input analog signal, each having a voltage quantizing interval of .DELTA.V; an output terminal; and a multiplexing circuit, such as a parallel-to-serial converter, for alternately applying to the output terminal the binary coded digital signals of the first and the second analog-to-digital converting stages. In order to achieve greater accuracy, an offset circuit is included to provide to one of the first and the second analog-to-digital converting stages an offset voltage, relative to the other of such stages, of 1/2 .DELTA.V.

REFERENCES:
patent: 3656152 (1972-04-01), Gundersen
patent: 3949170 (1976-04-01), Shionoya
patent: 4183016 (1980-01-01), Sawagata
patent: 4345241 (1982-08-01), Takeuchi

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