Level-shift type digital to analog converter

Details Level-shift type digital to analog converter Level-shift type digital to analog converter

1997-04-07

1998-04-28

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 166

Patent

active

057450650

ABSTRACT:
This present invention relates to a level-shift type digital to analog converter including a selection circuit, a multiple voltage level generation circuit, a stabilization circuit and a level-shift type buffer stage circuit. The multiple voltage level generation circuit is composed by a divided-step voltage output circuit and a level voltage output circuit, for generating a plurality of voltage levels to directly output to a level-shift type buffer stage circuit or alternatively, to be processed through voltage selection in order to respectively output the divided-step voltage output values and the level voltage output values to a level-shift type buffer stage circuit. A stabilization circuit generates a reference voltage or a reference current insensitive to the power supply voltage V.sub.DD for other elements of the converter. Finally, the level-shift type buffer stage circuit synthesizes the received divided-step voltage and the level voltage, amplifies them with appropriate times and finally converts them to analog output signals.

REFERENCES:
patent: 4607249 (1986-08-01), Naylor
patent: 5079552 (1992-01-01), Pelgrom et al.

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