Current source circuit with temperature compensation
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United States of America Patent
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Apr 14, 2015
Grant Date -
Oct 10, 2013
app pub date -
Apr 5, 2013
filing date -
Apr 5, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A current source circuit with temperature compensation includes a power supply terminal, a reference current source unit connected to the power supply terminal, a feedback control unit connected to the power supply terminal and the reference current source unit, a current source generating unit connected to the feedback control unit and a ground terminal connected to the current source generating unit. The reference current source unit is a current source connected to the power supply terminal. The feedback control unit includes a first switching element, connected to the current source, and an inverting amplifier, connected between the current source and the first switching element. The current source generating unit includes a second switching element, connected to the first switching element, the current source and the inverting amplifier, and a first resistor, connected to the first and the second switching elements and the ground terminal.
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