Differential amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorYusuke Shimamune
Life of this patent
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Abstract
A differential amplifier circuit includes a differential pair including a first field-effect transistor (FET) and a second FET, a first current source that generates a current which flows in the first FET and the second FET, and an output circuit that outputs an output voltage corresponding to a difference between a gate voltage of the first FET and a gate voltage of the second FET in accordance with an operation of the differential pair. A back gate of the first FET is connected to a gate of the first FET, and a back gate of the second FET is connected to a gate of the second FET. A first feedback voltage corresponding to the output voltage is input to the gate of the second FET.
Claims9
A bandgap reference circuit comprising:
- a differential transistor pair including a first field-effect transistor and a second field-effect transistor;
- and
- a first current source configured to generate a current that flows through the first field-effect transistor and the second field-effect transistor;
- wherein a back gate of the first field-effect transistor is connected to a gate of the first field-effect transistor,
- wherein a back gate of the second field-effect transistor is connected to a gate of the second field-effect transistor, and
- wherein the back gate of the first field-effect transistor is connected to the gate of the first field-effect transistor independently of the back gate of the second field-effect transistor being connected to the gate of the second field-effect transistor.
Dependencies are inferred from the claim text.