Title:
バイアス電圧供給回路および高周波増幅回路
Document Type and Number:
Japanese Patent JP4026603
Kind Code:
B2
Abstract:
A bias-voltage supply circuit of a radio-frequency amplification circuit has the constant-voltage power supply generating a constant voltage higher than the bias voltage, a rectifier transistor and a constant-current power supply supplying a constant current to the rectifier transistor. The rectifier transistor is connected between a supply point of a bias voltage connected to an input terminal of the radio-frequency amplification transistor via an element for bias supply and a power supply voltage supply line, wherein a control terminal is kept by the constant voltage that the constant-voltage power supply generates. Since descent of the electric potential of the input terminal of a radio-frequency signal does not arise because of circuit composition, the radio-frequency amplification circuit has a good saturation characteristic.
Inventors:
Noboru Sao
Norio Koji
Norio Koji
Application Number:
JP2004037969A
Publication Date:
December 26, 2007
Filing Date:
February 16, 2004
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G05F3/26; G05F3/16; G05F3/20; H03F3/19
Domestic Patent References:
| JP9054621A | ||||
| JP63107306A | ||||
| JP2000332124A | ||||
| JP20029558A | ||||
| JP11163640A |
Attorney, Agent or Firm:
Takahisa Sato