Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2007-02-06
2009-12-29
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S118000, C341S119000, C341S120000, C341S121000, C341S144000
Reexamination Certificate
active
07639168
ABSTRACT:
A switch signal generator circuit that may form part of a digital to analog converter is provided. The switch signal generator circuit may include a first switch that controls a high reference gate voltage. The high reference gate voltage may provide the ON state voltage for a plurality of switches that control the coupling of a high reference voltage to the digital to analog converter. The switch signal generator circuit may include a second switch that controls a low reference gate voltage. The low reference gate voltage may provide the ON state voltage for a plurality of switches that control the coupling of a low reference voltage to the digital to analog converter. The switch signal generator circuit may also include a resistor. In one embodiment of the invention, a current conducted by the first switch and/or a current conducted by the second switch may each be proportional to a current conducted by the resistor. One of the switches in the switch generator circuit may be a P channel switch. One may be an N channel switch. In one embodiment of the invention, current conducted by the first switch may be proportional to the current conducted by the second switch. Also the current conducted by the first switch may be proportional to temperature.
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Linear Technology Corporation
McDermott Will & Emery LLP
Nguyen Linh V
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