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:
Apr. 19, 2022
Filed:
Feb. 18, 2020
Applicant:
Mediatek Inc., Hsinchu, TW;
Inventors:
Sung-Han Wen, Hsinchu, TW;
Kuan-Ta Chen, Hsinchu, TW;
Assignee:
MEDIATEK INC., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/19 (2006.01); H03F 1/02 (2006.01); H03F 3/04 (2006.01); H03G 3/30 (2006.01);
U.S. Cl.
CPC ...
H03F 1/02 (2013.01); H03F 3/04 (2013.01); H03G 3/30 (2013.01); H03G 2201/103 (2013.01);
Abstract
A multi-stage amplifier with a high signal-to-noise ratio is introduced. Multiple amplification stages are cascaded between an input terminal and an output terminal of the amplifier. A controller switches the output stage among the multiple amplification stages from a normal mode to an attenuation mode in response to the amplifier input being lower than the threshold. In the attenuation mode, the output stage provides an attenuation resistor coupled in series with the load resistor of the amplifier. Noise is successfully attenuated by the attenuation-mode output stage.