CMOS substrate bias generator having only P channel transistors in the charge pump
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United States of America Patent
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Apr 8, 1986
Grant Date -
N/A
app pub date -
Nov 2, 1983
filing date -
Nov 2, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CMOS substrate bias generator including a PMOS charge pump and a regulator for controlling the operation of the substrate bias generator. The substrate bias generator further includes an input circuit, a reference circuit to provide a reference voltage, a comparison circuit to compare voltage levels between the input and the reference circuit, and output circuitry to provide a signal from the comparison circuitry to the substrate bias generator. The comparison circuitry further includes hysteresis circuitry tending to preserve voltage at a node in the comparison circuit despite an imbalance between the input circuit and the reference circuit.
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