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. 12, 2020
Filed:
Mar. 22, 2019
Mediatek Singapore Pte. Ltd., Singapore, SG;
E-Hung Chen, Irvine, CA (US);
Tamer Mohammed Ali, Irvine, CA (US);
Ahmed Othman Mohamed Mohamed ElShater, Corvallis, OR (US);
Mazen Soliman Shawky Soliman, Cupertino, CA (US);
MEDIATEK Singapore Pte. Ltd., Singapore, SG;
Abstract
An attenuator system comprising a variable impedance configured to provide an impedance from among a plurality of impedance states, the variable impedance comprising a first port, a second port, a first transistor comprising first and second channel terminals coupled between the first port and the second port, and a second transistor comprising first and second channel terminals coupled between the first port and the second port, and a control circuit configured to control the variable impedance to a first impedance state of the plurality of impedance states at least in part by providing a first output voltage to a control terminal of the first transistor to turn the first transistor on, wherein the first transistor is configured to operate in an under-driven mode when turned on.