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US 2014/0210556 A1Published application
High-frequency amplifier
AssigneeTDK Corporation
InventorsTomohiko SHIBUYA, Atsushi AJIOKA, Sadaharu Yoneda, Atsushi TSUMITA
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Abstract
Since a high-frequency signal that is output from a high-frequency oscillator circuit section is detected in a detector circuit and a bias of a negative voltage is supplied from a bias circuit section to the high-frequency amplifier circuit section with a detection voltage that is detected, a negative power supply circuit such as a DC/DC converter or a peripheral circuit is not required, and since a negative bias voltage can be supplied to a high-frequency amplifier circuit, downsizing can be achieved with a low cost.
Claims4
A high-frequency amplifier comprising:
- a high-frequency oscillator circuit section that generates a high-frequency signal;
- a high-frequency amplifier circuit section that amplifies and outputs the high-frequency signal;
- a bias circuit section that supplies a bias to the high-frequency amplifier circuit section;
- and
- a detector circuit section that detects the high-frequency signal which is output from the high-frequency oscillator circuit section between the high-frequency oscillator circuit section and the high-frequency amplifier circuit section, and inputs a voltage to the bias circuit section,
- wherein a negative voltage component of the high-frequency signal from the detector circuit section is detected, the detection voltage that is detected is supplied to the bias circuit section, and the bias voltage of the bias circuit section that is supplied to the high-frequency amplifier circuit section is a negative bias voltage.
3 more elements
Dependencies are inferred from the claim text.