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:
Aug. 02, 2016
Filed:
Aug. 27, 2015
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Daniele Mastantuono, Lund, SE;
Sven Mattisson, Bjärred, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
In a passive mixer, switches and a capacitance are shared between bootstrapped mixing transistors, reducing the number of components required as compared to prior art bootstrap designs. Shared bootstrap circuits operate in an interleaved fashion between I and Q mixer circuits, at twice the LO frequency. That is, the shared bootstrap circuits in each I mixer circuit charge their capacitors in a first half-period of a clock, and connect the shared capacitor to the gate of an enabled mixing transistor in the second half-period. The shared bootstrap circuits in the Q mixer circuit charge their capacitors in the second half-period, and connect the shared capacitor to the gate of an enabled mixing transistor in the first half-period. One of two mixing transistors connected to each shared bootstrap circuit is alternately enabled during the clock signal half-periods that the shared bootstrap circuit is not charging its capacitor.