Digital-to-analog converter to produce paired control...

Details Digital-to-analog converter to produce paired control... Digital-to-analog converter to produce paired control...

2011-07-12

2011-07-12

Williams, Howard (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Converter is part of control loop

C341S152000, C323S283000, C327S172000, C332S109000

Reexamination Certificate

active

07978107

ABSTRACT:
An example digital-to-analog converter (DAC) for a power supply controller includes a first node, a second node, a current source, and a switch. The first node is to be coupled to provide a first analog signal to a variable oscillator of the power supply controller. The second node is to be coupled to provide a second analog signal to the variable oscillator of the power supply controller. The switch is coupled to the current source and configured to couple the current source to the first node to provide current to the first analog signal in response to a binary digit received by the DAC, where the switch is further configured to couple the current source to the second node to provide current to the second analog signal in response to a complement of the binary digit.

REFERENCES:
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patent: 6501402 (2002-12-01), Boxho
patent: 7548047 (2009-06-01), Dasgupta et al.
patent: 2002/0021236 (2002-02-01), Greig

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