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US 2006/0214729 A1Published application
High frequency power amplifier circuit
AssigneeRenesas Technology Corp.
InventorsTomio Furuya, Kazuhiko Ishimoto, Hiroyuki Tanaka
Life of this patent
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AssigneeRenesas Technology Corp.
InventorsTomio Furuya, Kazuhiko Ishimoto, Hiroyuki Tanaka
Estimating the term…
A high frequency power amplifier circuit includes amplifying devices whose control terminals (gate or base terminals) are supplied with a bias voltage. The high frequency power amplifier circuit keeps constant the bias voltage so that the amplifying devices operate in a saturation region. The high frequency power amplifier circuit controls an operating power supply voltage supplied to the amplifying devices in accordance with an output request level to control output power. A device (diode) having temperature dependency is provided for an operating power supply voltage control circuit that controls the operating power supply voltage for the amplifying devices in accordance with the output request level. The operating power supply voltage control circuit is configured to generate the operating power supply voltage corresponding to the device's temperature characteristics and supply it to the amplifying devices.
A high frequency power amplifier circuit having an operating power supply voltage control circuit which keeps constant a bias voltage applied to an amplifying device's control terminal and controls a amplifying device's operating power supply voltage in accordance with an output level designation signal for designating a transmission output level to control output power,
Dependencies are inferred from the claim text.