Title:
DIFFERENTIAL AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2018/027653
Kind Code:
A1
Abstract:
A differential amplifier, comprising a previous-stage drive level (106), an input balun (101), a matching network (102), a differential transistor pair (103), a bias network (104) and an output balun (105). An output end of the previous-stage drive level (106) is connected to an input end (203) of the input balun (101). An output end (205) of the input balun (101) is connected to an input end of the matching network (102), an output end of the matching network (102) is connected to an input end of the differential transistor pair (103) and the bias network (104), and an output end of the differential transistor pair (103) is connected to the output balun (105). The input balun (101) is a single-turn stacked transformer. The output balun (105) is a planar transformer with a full inner-frame and a half outer-frame. The input balun of the differential amplifier is a single-turn stacked transformer, and the output balun has a structure with a full inner-frame and a half outer-frame, so that the differential amplifier takes up less space, and has low loss, high operating frequency and better power amplifier efficiency.
Inventors:
XU YUEHANG (CN)
XIAO WEI (CN)
LIU XIANSUO (CN)
SUN BOWEN (CN)
XIAO WEI (CN)
LIU XIANSUO (CN)
SUN BOWEN (CN)
Application Number:
PCT/CN2016/094315
Publication Date:
February 15, 2018
Filing Date:
August 10, 2016
Export Citation:
Assignee:
UNIV OF ELECTRONIC SCIENCE AND TECHNOLOGY (CN)
International Classes:
H03F3/45
Foreign References:
| CN103414437A | 2013-11-27 | |||
| CN103985503A | 2014-08-13 | |||
| CN104052416A | 2014-09-17 | |||
| EP3041135A1 | 2016-07-06 | |||
| US20040095163A1 | 2004-05-20 |
Other References:
AFLAKI, P.: "Enhanced architecture for microwave current-mode class-D amplifiers applied to the design of an S-band GaN-based power amplifier", IET MICROWAVES, ANTENNAS & PROPAGATION, vol. 3, no. 6, 30 September 2009 (2009-09-30), pages 997 - 1006, XP006033681
Attorney, Agent or Firm:
BEIJING TENG HUI LAW FIRM (CN)
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