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US 2010/0244959 A1Published application
Operational amplifier
AssigneeNEC Electronics Corporation
InventorMasaki Shibuya
Life of this patent
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Abstract
An operational amplifier includes a differential amplifier input stage that supplies an operating current to a differential pair, the differential amplifier input stage including a first transistor having a first polarity, a push-pull amplifier output stage that includes a second transistor having the first polarity, and a third transistor having a second polarity, the second transistor and the third transistor being connected in series, and a capacitive element that connects a gate of the first transistor and a gate of the second transistor.
Claims6
An operational amplifier comprising:
- a differential amplifier input stage that supplies an operating current to a differential pair, the differential amplifier input stage comprising a first transistor having a first polarity;
- a push-pull amplifier output stage that comprises a second transistor having the first polarity, and a third transistor having a second polarity, the second transistor and the third transistor being connected in series;
- and
- a capacitive element that connects a gate of the first transistor and a gate of the second transistor.
1 more element
An operational amplifier comprising:
- a differential amplifier input stage that supplies an operating current to a differential pair, the differential amplifier input stage comprising a first transistor;
- a push-pull amplifier output stage that comprises a second transistor and a third transistor connected in series, the second transistor and the third transistor having different polarities;
- and
- a capacitive element that connects a gate of the first transistor and a gate of any one of the second transistor and the third transistor, wherein
- a potential that varies inversely with a potential of an input signal input to the differential amplifier input stage is supplied to a terminal of the capacitive element that is connected to the gate of any one of the second transistor and the third transistor.
2 more elements
Dependencies are inferred from the claim text.