Digital-to-analog converter with logarithmic selectable...

Details Digital-to-analog converter with logarithmic selectable... Digital-to-analog converter with logarithmic selectable...

2007-02-27

2010-06-08

Williams, Howard (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S154000, C338S140000

Reexamination Certificate

active

07733255

ABSTRACT:
Embodiments of a digital-to-analog converter (DAC) with a logarithmic response and methods for converting digital signals to analog are generally described herein. Other embodiments may be described and claimed. In some embodiments, the DAC includes a wedge-shaped resistive array having a plurality of linearly-spaced contact nodes and a switching array to selectively couple one of the contact nodes with an analog output based on a control signal. Each of the contact nodes may provide a corresponding reference voltage that varies logarithmically with respect to the linearly-spaced contact nodes.

REFERENCES:
patent: 3594686 (1971-07-01), Fujii et al.
patent: 3613042 (1971-10-01), Leerkamp et al.
patent: 5534864 (1996-07-01), Ono et al.
patent: 5712613 (1998-01-01), Buckner et al.
patent: 6295013 (2001-09-01), Barna et al.
patent: 7333040 (2008-02-01), Dierickx et al.

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