Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1995-01-04
1996-10-22
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341118, H03M 168, H03M 110
Patent
active
055681468
ABSTRACT:
A digital/analog converter comprising a coarse bit decoder for decoding M higher-order bits of an (M+N)-bit input digital signal, a fine bit decoder for decoding N lower-order bits of the (M+N)-bit input digital signal, a current scaler for classifying currents into a plurality of steps and outputting a selected one of the classified step currents in response to an output signal from the coarse bit decoder, a current/voltage converter for converting an output current from the current scaler into a voltage, a voltage elevator for outputting an output voltage from the current/voltage converter as a reference voltage, a voltage divider for dividing the reference voltage from the voltage elevator into a plurality of steps and outputting a selected one of the divided step voltages in response to a switching control signal from the fine bit decoder, and a current compensator for compensating for an amount of current flowing through the voltage divider to make the reference voltage in the voltage divider constant in level.
REFERENCES:
patent: 5111205 (1992-05-01), Morlon
patent: 5243347 (1993-09-01), Jackson et al.
patent: 5283580 (1994-02-01), Brooks et al.
Goldstar Electron Co. Ltd.
Williams Howard L.
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