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.
Claims14
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, and the second input being coupled to a voltage feedback node;
- transconductor, coupled to an output of the operational amplifier, and having an output coupled to an input of the converter;
- at least one current mirror for replicating a current flow of the output of the transconductor, a current flow of the current mirror being an output of the converter;
- and
- a FET, coupled between the voltage feedback node and the input of the converter, and having:
- a gate coupled to the input of the converter;
- and a source coupled to the voltage feedback node.
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, and the second input being coupled to a voltage feedback node;
- a first transconductor, coupled to an output of the operational amplifier, and having an output coupled to an input of the converter;
- a first current mirror for replicating a current flow of the output of the first transconductor, a current flow of the first current mirror being a first output of the converter;
- a second transconductor, coupled to the output of the operational amplifier, and having an output coupled to the input of the converter;
- and
- a second current mirror for replicating a current flow of the output of the second transconductor, a current flow of the second current mirror being a second output of the converter.
Dependencies are inferred from the claim text.