Voltage-to-current converter
AssigneeTexas Instruments Incorporated
InventorDinesh Jain
Life of this patent
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Abstract
A voltage-to-current converter includes an input stage having a first input and a second input. The first input is connectable to a reference voltage, wherein the voltage of the second input is substantially the same as the voltage at the first input. A feedback loop is coupled between the second input and a voltage feedback node. A current feedback node is connectable to a first node of a resistor; the second node of the resistor is connectable to a voltage input, wherein a bias voltage of the current feedback node is set by the voltage of the voltage feedback node. At least one current mirror mirrors the current input to the current feedback node, the output of the at least one current mirror is the output of the voltage-to-current converter.
Claims16
A voltage-to-current converter comprising:
- an input stage having a first input and a second input, the first input being connectable to a reference voltage, wherein the voltage of the second input is maintained at substantially the same as the voltage at the first input;
- a feedback loop coupled between the second input and a voltage feedback node;
- a current feedback node connectable to a first node of a resistor, the second node of the resistor being connectable to a voltage input, wherein a bias voltage of the current feedback node is set by the voltage of the voltage feedback node;
- and
- at least one current mirror for mirroring the current input to the current feedback node, the output current of the at least one current mirror being the output of the voltage-to-current converter.
A voltage-to-current converter comprising:
- an operational amplifier having a first input and a second input, the first input being connectable to a reference voltage, the second input being coupled to a voltage feedback node;
- at least one transconductor coupled to the output of the operational amplifier, the output of the transconductor being coupled to an input of the converter;
- at least one current mirror for replicating the current flow of the output of the at least one transconductor, the current flow of the at least one current mirror being a first output of the converter.
Dependencies are inferred from the claim text.