Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1997-11-28
2000-06-06
Young, Brian
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341118, H03M 166
Patent
active
060724137
ABSTRACT:
In a digital-to-analog converter, a logic circuit includes a plurality of MOS transistors each having a gate connected to one of input signal lines, a drain connected to a first power supply terminal and a source which has one of a connection state where the source is connected to one of output signal lines and a disconnection state where the source is not connected to the output signal lines. A reference current source includes a constant current source and a first transistor connected in series. A digital-to-analog conversion section includes a plurality of second transistors each connected to one of the output signal lines and to the first transistor. Each of the second transistors forming a current mirror circuit with the first transistor. The digital-to-analog conversion section also includes a plurality of third transistors each connected between an output terminal and one of the output signal lines.
REFERENCES:
patent: 5841382 (1998-11-01), Walden et al.
patent: 5870043 (1999-02-01), Hiromi
patent: 5892471 (1999-04-01), Mahant-Shetti et al.
NEC Corporation
Wamsley Patrick
Young Brian
LandOfFree
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