Input stage protection circuit for a receiver
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United States of America Patent
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-
Mar 26, 2002
Grant Date -
Aug 9, 2001
app pub date -
Mar 19, 1999
filing date -
Mar 19, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An extraneous voltage protection circuit and method transforms an overvoltage input signal or undervoltage input signal to a suitable voltage level for a protected circuit. An input voltage dependent variable reference voltage is used to protect overvoltage protection circuitry against unsuitable undervoltage conditions. In one embodiment, an overvoltage protection circuit, an undervoltage protection circuit, and an input voltage dependent variable reference voltage source is made of single gate oxide MOS devices.
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