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.
Patent No.:
Date of Patent:
Aug. 20, 2019
Filed:
Feb. 15, 2018
Psj International Ltd., Tortola, VG;
Shau-Gang Mao, Taipei, TW;
PSJ INTERNATIONAL LTD., Tortola, VG;
Abstract
An envelope tracking frontend device and a switch thereof are provided. The envelope tracking frontend device includes a power amplifier coupled, a switch and an envelope tracking module including an envelope tracking bias supply coupled between the signal generator and the switch. The switch includes a transmit-receive port, a transmit port coupled to the power amplifier, a receive port, a first terminal and a second terminal in series connection, and a third transistor and a fourth transistor as shunt transistors. The envelope tracking bias supply is configured to provide an envelope forward bias signal to the gate of the second transistor and the gate of the fourth transistor, and provide an envelope reverse bias signal to the gate of the first transistor and the gate of the third transistor such that an amplified signal is modulated before being provided by the switch.