Auto-calibrated D-A converter

Communications: electrical – Audible indication – Percussion-type sound producer

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Details

340347M, 340347CC, H03K 1303

Patent

active

043694322

ABSTRACT:
A plurality of code signal generators are provided, respectively corresponding to bits of a digital signal to be converted. Each of the code signal generators generates a pulse signal having a duty ratio corresponding to the weight of the corresponding bit of the digital signal. The pulse signal is smoothed to provide a DC output corresponding to the weight of the bit. The outputs from the code signal generators corresponding to the respective bits of the input digital signal are summed by a summing circuit to obtain an analog converted output.

REFERENCES:
patent: 2718634 (1955-09-01), Hansen
patent: 3064887 (1962-11-01), Waters et al.
patent: 3254337 (1966-05-01), Hunt
patent: 4107670 (1978-08-01), Hornak
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 206-211.

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