Title:
WIRELESS APPARATUS AND METHOD FOR CONTROLLING VOLTAGE SUPPLIED TO AMPLIFIER UNIT
Document Type and Number:
WIPO Patent Application WO/2015/041067
Kind Code:
A1
Abstract:
Provided is a technique for effectively implementing DC removal during switching of transmission scheme or transmission data in a wireless device provided with a function for supplying voltage to be supplied to an amplifier unit by ET control. When an ET operation is not carried out in a power supply unit (10), more specifically, when an IQ signal is not present, a control unit (50) outputs a power width modulation (PWM) signal for a fixed voltage via a switch unit (42). In other words, the switch unit (42) selectively supplies a PWM signal for ET and a PWM signal for fixed voltage. A switching amplifier (43) is controlled by a predetermined control signal from a control unit (50).
Inventors:
DOSAKA JUNYA (JP)
Application Number:
PCT/JP2014/073449
Publication Date:
March 26, 2015
Filing Date:
September 05, 2014
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
International Classes:
H03F1/06; H03F3/24; H03F3/68; H04B1/04
Domestic Patent References:
| WO2005011109A1 | 2005-02-03 |
Foreign References:
| JP2013074568A | 2013-04-22 | |||
| JP2013511242A | 2013-03-28 |
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