Variable gain amplifier controller
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United States of America Patent
Stats
-
Oct 12, 2004
Grant Date -
May 2, 2002
app pub date -
Oct 30, 2001
filing date -
Oct 31, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Apparatus responsive to a signal derived by a magnetic transducer includes a variable gain amplifier arrangement having an input responsive to the signal and an output terminal. An analog gain control circuit responds to the signal at the output terminal. An analog to digital converter responds to the signal at the output terminal. Circuitry responsive to an output signal of the analog gain control circuit and an output signal of the analog to digital converter causes the gain of the variable gain amplifier to be simultaneously controlled in response to gain control output signals resulting from the output signals of the analog gain control circuit and the analog to digital converter. Both gain control output signals are derived in response to the same instantaneous value of the output signal at the output terminal of the variable gain amplifier arrangement.
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