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. 31, 2016
Filed:
Jan. 23, 2013
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Imad ud Din, Lund, SE;
Stefan Andersson, Lund, SE;
Henrik Sjoland, Lund, SE;
Johan Wernehag, Malmo, SE;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
A down-conversion circuit for a receiver circuit is disclosed, the down-conversion circuit comprises a first passive switching mixer arranged to down-convert a received radio frequency, RF, signal with a first local oscillator, LO, signal (LO) having a first duty cycle for generating a first down-converted signal at an output port of the first passive switching mixer. The down-conversion circuit further comprises a second passive switching mixer arranged to down-convert the received RF signal with a second LO signal (LO) having the same LO frequency as the first LO signal (LO) and a second duty cycle, different from the first duty cycle, for generating a second down-converted signal at an output port of the second passive switching mixer. In addition, the down-conversion circuit comprises a passive output combiner network operatively connected to the output ports of the first passive switching mixer and the second passive switching mixer and arranged to combine the first and the second down-converted signals such that harmonically down-converted signal content present in the first down-converted signal and harmonically down-converted signal content present in the second down-converted signal cancel in a combined output signal of the down-conversion circuit. The passive output combiner network is tunable to adjust magnitudes and phases of the first and the second down-converted signals. A related quadrature down-conversion circuit, a related receiver circuit, a related communication device, and a related calibration method are also disclosed.