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:
Nov. 01, 2016
Filed:
Nov. 07, 2014
Qualcomm Incorporated, San Diego, CA (US);
Hanan Cohen, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Systems and methods for converting digital signals into clock phases are disclosed. An example digital-to-phase converter circuit receives a complementary in-phase and quadrature clock signals and produces four clock outputs at a phase controlled by a digital phase control input. The digital-to-phase converter uses first and second pre-driver modules to buffer the -phase and quadrature clock signals and produce corresponding buffered clock signals having controlled slew rates. Mixer modules produce the clock outputs by forming weighted combinations of the buffered clock signals. The weighting is determined based on the phase control input. The controlled slew rates of the buffered clock signals allow digital mixer module to provide accurate phase control. The digital-to-phase converter may also include an output buffer that compensates for nonlinearities in the relationship between the phases of the clock outputs and the phase control input.