Authorization control circuit and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 9, 2009
Grant Date -
N/A
app pub date -
Nov 15, 2000
filing date -
Dec 16, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An authorization control circuit (10) comprises a digital signal processor (12) operable to provide digital data output, determine an authorization state, and generate a disable signal. A digital to analog converter (28,60) is coupled to the digital signal processor (12) and is operable to receive the digital data output. The digital to analog converter (28,60) generates analog data in response to the digital data output and is operable to output the analog data and mute the output of analog data. The digital to analog converter (28,60) includes an input (23,25,27,59) operable to receive the disable signal. The digital to analog converter (28,60) mutes the output of analog data in response to the disable signal.
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