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:
May. 11, 2021
Filed:
Oct. 28, 2019
Smarter Microelectronics (Shanghai) Co., Ltd., Shanghai, CN;
SMARTER MICROELECTRONICS (SHANGHAI) CO., LTD., Shanghai, CN;
Abstract
A bias circuit includes a first branch circuit, a second branch circuit, a current amplifier and a switch, wherein the first branch circuit is configured to shunt an inputted first current, and input a first branch current of the first current to a power supply ground; the second branch circuit is configured to shunt the inputted first current, and input a second branch current of the first current to the current amplifier; the current amplifier is configured to receive the second branch current of the first current and amplify the second branch current of the first current to serve as a bias current of a power amplifier connected to the bias circuit for outputting; and the switch is configured to switch different resistance values for a resistor in the first branch circuit and/or switch different resistance values for a resistor in the second branch circuit.