CMOS current source circuit
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United States of America Patent
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Apr 28, 1998
Grant Date -
N/A
app pub date -
Jan 22, 1996
filing date -
Sep 27, 1995
priority date (Note) -
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Abstract
An improved CMOS current source circuit capable of constantly generating a certain reference voltage irrespective of an analog supplying voltage, a substrate temperature, and a temperature variation, which includes a start unit for driving the CMOS current source circuit in accordance with a start signal; a bias current generating unit driven by the start unit for generating a bias current in accordance with an analog voltage, a substrate voltage, and a temperature variation; a current input unit for inputting a bias current; and a current compensation unit for receiving a bias current through the current input unit and for compensating the bias current in accordance with an analog voltage, a substrate voltage, and a temperature variation and for generating a reference current.
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