Title:
POWER AMPLIFIER UNIT, COMMUNICATION TERMINAL AND CONTROL METHOD OF POWER AMPLIFIER UNIT
Document Type and Number:
WIPO Patent Application WO/2005/076467
Kind Code:
A1
Abstract:
A power amplifier unit having a power amplifier which can be used efficiently without causing any trouble in operation. A control section (11) makes a decision based on an estimated output power level whether the power amplifier is in a first period performing low power output operation or in a second period performing high power output operation. During the first period, a DC/DC converter (2) is brought into active state and a power supply voltage Vdd2 is supplied as the operating power supply voltage of an HPA (1). During the second period, activation/inactivation of the DC/DC converter (2) and on/off of a switch (3) are controlled based on a power supply voltage level VM detected by an operating power supply voltage detecting circuit (13) and one of the power supply voltage Vdd2 or a power supply voltage Vdd3 is supplied as the operating power supply voltage.
Inventors:
BABA MAKOTO (JP)
Application Number:
PCT/JP2004/001305
Publication Date:
August 18, 2005
Filing Date:
February 06, 2004
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
BABA MAKOTO (JP)
BABA MAKOTO (JP)
International Classes:
H03F1/02; H03F3/24; H03G1/00; H03G3/00; H03G3/30; (IPC1-7): H03F3/24; H03G3/30
Foreign References:
| JP2001320288A | 2001-11-16 | |||
| JP2002094392A | 2002-03-29 | |||
| JP2000165261A | 2000-06-16 |
Other References:
See also references of EP 1713176A4
Attorney, Agent or Firm:
Yoshida, Shigeaki (4-70 Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, JP)
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