Power amplification module
AssigneeMurata Manufacturing Co., Ltd.
InventorMasatoshi Hase
Life of this patent
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Abstract
A power amplification module includes: a first bipolar transistor in which a radio frequency signal is input to a base and an amplified signal is output from a collector; a second bipolar transistor that is thermally coupled with the first bipolar transistor and that imitates operation of the first bipolar transistor; a third bipolar transistor in which a first control voltage is supplied to a base and a first bias current is output from an emitter; a first resistor that generates a third control voltage corresponding to a collector current of the second bipolar transistor at a second terminal; and a fourth bipolar transistor in which a power supply voltage is supplied to a collector, the third control voltage is supplied to a base, and a second bias current is output from an emitter.
Claims20
A power amplification module comprising:
- a first bipolar transistor, from which an amplified signal is output when a radio frequency signal is input to the first bipolar transistor;
- a second bipolar transistor that is thermally coupled with the first bipolar transistor, wherein the second bipolar transistor is configured to imitate operation of the first bipolar transistor when the radio frequency signal is input to the second bipolar transistor;
- a first resistor having a first terminal to which a second control voltage is supplied, and a second terminal connected to the second bipolar transistor and at which a third control voltage is generated, the third control voltage corresponding to a collector current of the second bipolar transistor;
- and
- a fourth bipolar transistor configured to output a second bias current from the fourth bipolar transistor to the first bipolar transistor and to the second bipolar transistor, when a power supply voltage is supplied to the fourth bipolar transistor and the third control voltage is supplied to the fourth bipolar transistor.
Dependencies are inferred from the claim text.