Title:
VARIABLE GAIN PHASE SHIFTER
Document Type and Number:
WIPO Patent Application WO/2019/050098
Kind Code:
A1
Abstract:
A variable gain phase shifter comprises an I/Q generator and a vector sum circuit. The I/Q generator generates phase signals on the basis of an input signal. The vector sum circuit, on the basis of phase signals, selection signals and current control signals, adjusts the size and direction of first, second, third and fourth in-phase vectors and first, second, third and fourth quadrature vectors, adds same and generates an output signal. The vector sum circuit comprises first, second, third and fourth vector sum cells and first, second, third and fourth current control circuits. The first and second vector sum cells adjust the direction of the first and second in-phase vectors and the first and second quadrature vectors. The third and fourth vector sum cells adjust the direction of the third and fourth in-phase vectors and the third and fourth quadrature vectors. The first and second current control circuits are connected to the first and second vector sum cells and adjusts the size of a first current and the size of a second current. The third and fourth current control circuits are connected to the third and fourth vector sum cells and adjust the size of a third current and the size of a fourth current.
Inventors:
HONG SONG-CHEOL (KR)
PARK JIN-SEOK (KR)
WANG SEUNG-HUN (KR)
KANG SEUNG-HOON (KR)
PARK JIN-SEOK (KR)
WANG SEUNG-HUN (KR)
KANG SEUNG-HOON (KR)
Application Number:
PCT/KR2017/014913
Publication Date:
March 14, 2019
Filing Date:
December 18, 2017
Export Citation:
Assignee:
KOREA ADVANCED INST SCI & TECH (KR)
International Classes:
H01Q3/36; H01P1/18
Foreign References:
| KR101195778B1 | 2012-11-05 | |||
| KR100532157B1 | 2005-11-30 | |||
| KR200307077Y1 | 2003-04-18 | |||
| KR20050113771A | 2005-12-05 | |||
| KR20050113773A | 2005-12-05 |
Attorney, Agent or Firm:
PARK, Young-woo (KR)
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