Tienyu Yu Chang

US Patent:

20220247062, Aug 4, 2022

Filed:

Aug 31, 2021

Appl. No.:

17/462580

Inventors:

- Gyeonggi-do, KR
Tienyu Chang - Sunnyvale CA, US
Sang Won Son - Palo Alto CA, US

International Classification:

H01P 5/18
H01Q 23/00

Abstract:

Disclosed is a device including a first line, a second line including a first section disposed on a first side of the first line and a second section disposed on a second side of the first line, the second side being opposite to the first side and the second section being separate from the first section by a distance, and at least one bridge electrically connecting an end of the first section with an end of the second section and extending across the first line. The device may be a directional coupler that achieves significantly higher directivity than conventional directional coupler structures, and hence, improves power detection accuracy.

US Patent:

20210384899, Dec 9, 2021

Filed:

Aug 6, 2020

Appl. No.:

16/987335

Inventors:

- Suwon-si, KR
Tienyu Chang - Sunnyvale CA, US

International Classification:

H03K 17/56
H03F 3/24
H04B 1/04

Abstract:

A shunt switch. In some embodiments, the shunt switch includes a transistor stack including a first transistor and a capacitor. The transistor stack may have a first end terminal and a second end terminal, the first transistor being connected to the first end terminal, the first end terminal being connected to a switching terminal of the shunt switch. The capacitor may have a first terminal connected to the second end terminal of the transistor stack, and a second terminal connected to a low-impedance node.

US Patent:

20210384923, Dec 9, 2021

Filed:

Aug 6, 2020

Appl. No.:

16/987390

Inventors:

- Suwon-si, KR
Xiaohua YU - San Jose CA, US
Tienyu CHANG - Sunnyvale CA, US
Sang Won SON - Palo Alto CA, US

International Classification:

H04B 1/00
H04B 1/12
H04B 1/44
H03D 7/14

Abstract:

A band-switching network includes a dual-band balun and a switch network. The dual-band balun includes a first output and a second output. The switch network includes a first switch and a second switch in which an input to the first switch is coupled to the first output and an input to the second switch is coupled to the second balanced output. The dual-band balun further includes a primary coil, a first secondary coil and a second secondary coil in which the first secondary coil is coupled to the first balanced output and the second secondary coil is coupled to the second balanced output. In one embodiment, the primary coil and the first secondary coil are coupled by a first coupling factor k, and the primary coil and the second secondary coil are coupled by a second coupling factor kthat is different from the first coupling factor k.

US Patent:

20210376794, Dec 2, 2021

Filed:

Aug 10, 2020

Appl. No.:

16/989421

Inventors:

- Gyeonggi-do, KR
Amitoj SINGH - Sunnyvale CA, US
Xiaohua YU - San Jose CA, US
Tienyu CHANG - Sunnyvale CA, US
Sang Won SON - Palo Alto CA, US

International Classification:

H03F 1/02
H03K 5/01
H03F 3/19

Abstract:

An electronic circuit and method are provided. The electronic circuit includes an in-phase(I)-quadrature(Q) amplifier including an I cascode branch and a Q cascode branch, the IQ amplifier configured to receive a differential input and control signals, control, based on the control signals, gate voltages in the I cascode branch and gate voltages in the Q cascode branch, generate an I output signal with the I cascode branch, and generate a Q output signal with the Q cascode branch, and a quadrature coupler configured to perform quadrature summation of the I output signal and the Q output signal and generate a final phase shifted output.