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:
Jun. 09, 2015
Filed:
Dec. 10, 2013
Montage Technology (Shanghai) Co., Ltd., Shanghai, CN;
Suzhou Montage Microelectronic Technology Co., Ltd., Suzhou, Jiangsu, CN;
Jun Xu, Shanghai, CN;
MONTAGE TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai, CN;
SUZHOU MONTAGE MICROELECTRONIC TECHNOLOGY CO., LTD., Suzhou, Jiangsu, CN;
Abstract
The present invention provides a wideband active balun LNA topology with narrow-band filtering and noise cancelling. The amplifier includes three transconductance stages, a feedback network, and a load. The first and second transconductance stages are connected in parallel to receive the input signal. The differential output of the first transconductance stage is fed back to voltage input through a differential-to-single-end-end feedback network, while the output of the first transconductance, passing through the third transconductance, is added to the output of the second transconductance stage in proper phase. The present invention accomplish both wideband low-noise amplification and narrow-band filtering without inserting interface stages, thereby improving the linearity and noise performance of the whole circuit. Noise cancellation technique is implemented in differential way to ensure the low noise figure. The present invention also achieves single-end to differential conversion with balanced output and superior second order linearity performance.