VOLTAGE-TO-CURRENT CONVERTER
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United States of America Patent
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Issued Date -
Oct 3, 2013
app pub date -
Sep 17, 2012
filing date -
Mar 30, 2012
priority date (Note) -
Abandoned
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Abstract
A voltage-to-current converter is described. In one embodiment, the voltage-to-current converter includes an operational amplifier, where a first input of the operational amplifier is coupled to a first node and a second input of the operational amplifier is coupled to a reference voltage. The input voltage is connected to the first node through a resistor which generates the input current. The voltage-to-current converter also includes a first transistor coupled to a first node and to an output of the operational amplifier, where the input current flows through the first transistor. The voltage-to-current converter also includes a second transistor coupled to the first transistor, to the output of the operational amplifier, and to an output node, where an output current flows through the second transistor. The first and second transistors constitute a current mirror to provide additional current gain for the output current.
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