Power amplifier circuit
First Claim
1. A power amplifier circuit comprising:
- a first transistor;
a second transistor;
a first bias circuit that supplies a first bias current or a first bias voltage;
a second bias circuit that supplies a second bias current or a second bias voltage;
a first inductor; and
a first capacitor, whereina power supply voltage is supplied to a collector of the first transistor,an emitter of the first transistor is grounded,a radio frequency signal and the first bias current or the first bias voltage are supplied to a base of the first transistor,the power supply voltage is supplied to a collector of the second transistor,an emitter of the second transistor is connected to the collector of the first transistor via the first capacitor, and is grounded via the first inductor,the second bias current or the second bias voltage is supplied to a base of the second transistor, andan amplified signal generated by amplifying the radio frequency signal is output from the collector of the second transistor.
1 Assignment
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Accused Products
Abstract
A power amplifier circuit includes a first transistor, a second transistor, a first bias circuit supplying a first bias current or voltage, a second bias circuit supplying a second bias current or voltage, a first inductor, and a first capacitor. A power supply voltage is supplied to a collector of the first transistor, and an emitter thereof is grounded. A radio frequency signal and the first bias current or voltage are supplied to a base of the first transistor. The power supply voltage is supplied to a collector of the second transistor, and an emitter thereof is connected to the collector of the first transistor via the first capacitor and is grounded via the first inductor. The second bias current or voltage is supplied to a base of the second transistor. An amplified radio frequency signal is output from the collector of the second transistor.
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Citations
20 Claims
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1. A power amplifier circuit comprising:
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a first transistor; a second transistor; a first bias circuit that supplies a first bias current or a first bias voltage; a second bias circuit that supplies a second bias current or a second bias voltage; a first inductor; and a first capacitor, wherein a power supply voltage is supplied to a collector of the first transistor, an emitter of the first transistor is grounded, a radio frequency signal and the first bias current or the first bias voltage are supplied to a base of the first transistor, the power supply voltage is supplied to a collector of the second transistor, an emitter of the second transistor is connected to the collector of the first transistor via the first capacitor, and is grounded via the first inductor, the second bias current or the second bias voltage is supplied to a base of the second transistor, and an amplified signal generated by amplifying the radio frequency signal is output from the collector of the second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification