Digital-to-analog converter with secondary resistor string

Details Digital-to-analog converter with secondary resistor string Digital-to-analog converter with secondary resistor string

2007-07-31

2007-07-31

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

11293177

ABSTRACT:
A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to be kept within tolerance by use of resistors with sufficiently high resistance values.

REFERENCES:
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patent: 5495245 (1996-02-01), Ashe
patent: 5619203 (1997-04-01), Gross et al.
patent: 5703588 (1997-12-01), Rivoir et al.
patent: 6373419 (2002-04-01), Nakao
patent: 6400300 (2002-06-01), Leung et al.
patent: 62-024713 (1987-02-01), None
patent: 11-074792 (1999-03-01), None
patent: 2000-183747 (2000-06-01), None
Office Action dated Apr. 11, 2006 issued in corresponding Japanese Patent Application No. 2005-179713.

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