Power amplification circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorMasatoshi Hase
Life of this patent
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Abstract
Provided is a power amplification circuit that includes: a first transistor that has an emitter to which a first radio frequency signal is supplied, a base to which a first DC control current or DC control voltage is supplied and a collector that outputs a first output signal that corresponds to the first radio frequency signal; a first amplifier that amplifies the first output signal and outputs a first amplified signal; and a first control circuit that supplies the first DC control current or DC control voltage to the base of the first transistor in order to control output of the first output signal.
Claims16
A power amplification circuit comprising:
- a first transistor having an emitter to which a first radio frequency signal is supplied, a base to which a first DC control current or first DC control voltage is supplied, and a collector from which a first output signal is output, the first output signal corresponding to the first radio frequency signal;
- a first amplifier that amplifies the first output signal and outputs a first amplified signal;
- a resistance element;
- and
- a capacitor,
- wherein one end of the resistance element is connected to the emitter of the first transistor and another end of the resistance element is grounded, thereby DC grounding the emitter of the first transistor, and
- wherein one end of the capacitor is connected to the base of the first transistor and another end of the capacitor is grounded, thereby AC grounding the base of the first transistor.
A power amplification comprising:
- a first transistor having an emitter to which a first radio frequency signal is supplied, a base to which a first DC control current or first DC control voltage is supplied, and a collector from which a first output signal is output, the first output signal corresponding to the first radio frequency signal;
- a first amplifier that amplifies the first output signal and outputs a first amplified signal;
- a first control circuit that supplies the first DC control current or first DC control voltage to the base of the first transistor thereby controlling supply of the first output signal to the first amplifier;
- a capacitor, wherein one end of the capacitor is connected to the base of the first transistor and another end of the capacitor is grounded, thereby AC grounding the base of the first transistor;
- a second transistor having an emitter to which the first radio frequency signal is supplied and that is DC grounded, a base to which a second DC control current or second DC control voltage is supplied and that is AC grounded, and a collector from which a second output signal is output, the second output signal corresponding to the first radio frequency signal;
- a second amplifier that amplifies the second output signal and outputs a second amplified signal;
- and
- a second control circuit that supplies the second DC control current or second DC control voltage to the base of the second transistor thereby controlling supply of the second output signal to the second amplifier.
Dependencies are inferred from the claim text.