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:
Oct. 09, 2018
Filed:
Jan. 29, 2016
Southeast University, Jiangsu, CN;
Southeast University, Jiangsu, CN;
Abstract
The present invention discloses a low power supply voltage double-conversion radio frequency receiving front end, which can work at a lower power supply voltage in a passive frequency conversion mode; a first frequency conversion unit and a second frequency conversion unit of the front end are directly cascaded, and a second orthogonal passive frequency conversion shifts a low input impedance of a transimpedance amplifier to an intermediate frequency, so as to construct a band-pass filtering function for radio frequency current; and the radio frequency current which has undergone two frequency conversions is converted into an output intermediate frequency voltage via the transimpedance amplifier. Compared with the traditional active+active or active+passive double conversion mode, the present invention omits intermediate-stage active circuits and filtering circuits, thereby saving power consumption and layout area, and realizing sufficient rejection on an image signal while ensuring a high conversion gain.