Reference current generation circuit
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United States of America Patent
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Jun 24, 2014
Grant Date -
Mar 8, 2012
app pub date -
Mar 10, 2011
filing date -
Sep 7, 2010
priority date (Note) -
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Abstract
One embodiment provides a reference current generation circuit. The circuit has first and second reference current generation circuits for generating first and second reference currents respectively, and a current output circuit for outputting a third reference current by adding the first and second reference currents. The first reference current generation circuit includes first and second current-voltage conversion circuits and a first current supply circuit. The first current supply circuit provides substantially equal amounts of current to the first and second current-voltage conversion circuits respectively. The second reference current generation circuit includes third to fifth current-voltage conversion circuits and a second current supply circuit. The second current supply circuit provides a current to the fourth current-voltage conversion circuit, divide and provide amounts of current substantially equal to that of the current provided to the fourth current-voltage conversion circuit, to the third and fifth current-voltage conversion circuits respectively.
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