Title:
送信機、送信方法
Document Type and Number:
Japanese Patent JP6558360
Kind Code:
B2
Abstract:
A transmitter according to an exemplary aspect of the present invention includes: a modulation circuit configured to modulate a baseband signal into a multi-bit digital signal including a component in a radio-frequency band; a plurality of switch-mode power amplifiers corresponding to each bit of the multi-bit digital signal output from the modulation circuit; and a signal synthesis circuit including a band limiting unit configured to perform a band limitation on output signals from the plurality of switch-mode power amplifiers, and a plurality of voltage-to-current converting units configured to perform a voltage-to-current conversion on respective output signals from the plurality of switch-mode power amplifiers, the signal synthesis circuit configured to makes a synthesized signal connecting the band limiting unit and the plurality of voltage-to-current converting units, wherein, depending on an output power at a synthesis point where the synthesized signal is made, a switch-mode power amplifier is selected which is configured to receive input of a pulse, and a pulse number of pulses to be inputted into the selected switch-mode power amplifier is controlled.
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Inventors:
Keiichi Motoi
Kazumi Shiikuma
Shinichi Hori
Kazumi Shiikuma
Shinichi Hori
Application Number:
JP2016506075A
Publication Date:
August 14, 2019
Filing Date:
October 29, 2014
Export Citation:
Assignee:
NEC
International Classes:
H03F3/217; H03F1/02; H03F3/24; H04B1/04
Domestic Patent References:
| JP2005516524A | ||||
| JP2006173722A |
Foreign References:
| WO2011070952A1 | ||||
| US20060001484 | ||||
| WO2011088200A1 | ||||
| WO2013094265A1 |
Attorney, Agent or Firm:
Masahiko Desk
Naoki Shimosaka
Naoki Shimosaka