The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jul. 14, 2020

Filed:

Dec. 28, 2018
Applicant:

Rafael Microelectronics, Inc., Hsinchu County, TW;

Inventor:

Kuan-Ming Chen, Hsinchu County, TW;

Assignee:

Rafael Microelectronics, Inc., Hsinchu County, TW;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/191 (2006.01); H03F 1/56 (2006.01); H03F 3/195 (2006.01); H03F 3/213 (2006.01); H03F 3/72 (2006.01);
U.S. Cl.
CPC ...
H03F 1/565 (2013.01); H03F 3/195 (2013.01); H03F 3/213 (2013.01); H03F 3/72 (2013.01); H03F 2200/165 (2013.01); H03F 2200/171 (2013.01); H03F 2200/222 (2013.01); H03F 2200/225 (2013.01); H03F 2200/231 (2013.01); H03F 2200/294 (2013.01); H03F 2200/387 (2013.01); H03F 2200/451 (2013.01);
Abstract

A circuit with co-matching topology for transmitting and receiving RF signals for return loss improvement, wherein when transmitting RF signals, the LNA is turned off and the capacitance of an adjustable capacitive component is adjusted for transmitting RF signals, and when receiving RF signals, the power amplifier and the adjustable capacitive component are turned off, wherein a matching network is designed in favor of the LNA for receiving RF signals while the adjustable capacitive component can adjust the overall impedance of the circuit including the matching network that is also used when transmitting RF signals and the adjustable capacitive component for improving the transmitting return loss.


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