Driving circuit and electronic device using the same
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United States of America Patent
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Nov 19, 2013
Grant Date -
Mar 29, 2007
app pub date -
Sep 18, 2006
filing date -
Sep 28, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A driving circuit is disclosed that has low power consumption and supplies a current to a load. The driving circuit includes a constant current circuit section to generate and output a predetermined constant current, a current mirror circuit section to generate a current proportional to an input current supplied from the constant current circuit section and supply the current to the load, and a constant voltage supplying circuit section to generate a constant voltage and supply the constant voltage to a series circuit of the load and an output transistor of the current mirror circuit. The constant voltage supplying circuit section gene-rates the constant voltage so that an output voltage of the current mirror circuit section equals an input voltage of the current mirror circuit section.
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