Title:
PLURAL FREQUENCY BANDS AMPLIFIER CIRCUIT
Document Type and Number:
Japanese Patent JP3508835
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To set constitution to be simple and to operate a circuit in plural frequency bands.
SOLUTION: The first input signal of a first frequency band is distributed in a phase shift distributor 2 into the signals of +90 degrees and -90 degrees. The first input signals distributed in the phase shift distributor 2 are amplified in amplification elements 3 and 4 and amplification outputs are phase-synthesized in a phase synthesizer 5. Thus, the amplification elements 3 and 4 execute push-pull amplification operation. The second input signal of a second frequency band, which is inputted when it is different from the first input signal, is distributed by an in-phase distributor 8. The second input signals distributed by the in-phase distributor 8 are amplified by the amplification elements 3 and 4. The amplification outputs are in-phase-synthesized in an inphase synthesizer 9. Then, the amplification elements 3 and 4 execute parallel amplification operation.
Inventors:
Kijima, Nobuyoshi
Application Number:
JP13130299A
Publication Date:
March 22, 2004
Filing Date:
May 12, 1999
Export Citation:
Assignee:
KENWOOD CORP
International Classes:
H03F3/68; H03F3/26; (IPC1-7): H03F3/68; H03F3/26
Attorney, Agent or Firm:
砂子 信夫
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