Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1991-09-27
1993-03-02
Hoff, Marc
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341136, H03M 168
Patent
active
051913330
ABSTRACT:
An digital-to-analog converting circuit comprises a reference voltage generating circuit for generating a plurality of different reference voltages, and a reference voltage selection circuit receiving the plurality of reference voltages for supplying two adjacent reference voltages selected in accordance with the most significant portion of a digital signal which should be converted into an analog signal. A digital-to-analog converter receives the two selected reference voltages as the highest level reference voltage and the lowest level reference voltage of the digital-to-analog converter. This digital-to-analog converter is controlled by the remaining portion of the digital signal so as to supply an analog voltage which is obtained by dividing a voltage range from one to the other of the two selected reference voltages into a plurality of voltage levels and by selecting one from the plurality of voltage levels in accordance with the remaining portion of the digital signal.
REFERENCES:
patent: 3997892 (1976-12-01), Susset
patent: 4338591 (1982-07-01), Tuthill
patent: 4491825 (1985-01-01), Tuthill
patent: 4918448 (1990-04-01), Hauviller et al.
patent: 5059978 (1991-10-01), Valdenaire
Hoff Marc
NEC Corporation
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