Title:
TRANSMISSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/249955
Kind Code:
A1
Abstract:
Provided is a transmission circuit that appropriately controls output power according to the impedance variation of a load. A transmission circuit 10 comprises: a transistor 1031 that is supplied with a bias current IB1, and that amplifies and outputs an input signal RFin; a transistor 1032 that is supplied with a bias current IB2, that amplifies and outputs an input signal, and that has a collector which is connected to a collector of the transistor 1031; a current generation circuit 106 that generates a current I2 on the basis of a current I1 from an emitter of the transistor 1032; and a bias control circuit 107 that outputs, on the basis of the current I2, a first bias control signal for controlling the bias current IB1 and a second bias control signal for controlling the bias current IB2.
Inventors:
HASE MASATOSHI (JP)
OONARO TSUTOMU (JP)
SOGA TAKASHI (JP)
OONARO TSUTOMU (JP)
SOGA TAKASHI (JP)
Application Number:
PCT/JP2022/020706
Publication Date:
December 01, 2022
Filing Date:
May 18, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B1/04; H03F3/24
Foreign References:
| JP2019161640A | 2019-09-19 | |||
| JP2005303401A | 2005-10-27 | |||
| JP2013501430A | 2013-01-10 | |||
| JPH11330866A | 1999-11-30 | |||
| JP2001196868A | 2001-07-19 | |||
| JPS4917654A | 1974-02-16 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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