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.

Date of Patent:
Oct. 24, 2017

Filed:

Feb. 23, 2016
Applicant:

Qualcomm Incorporated, San Diego, CA (US);

Inventors:

Yashar Rajavi, Mountain View, CA (US);

Jeongsik Yang, San Jose, CA (US);

Emilia Vailun Lei, Union City, CA (US);

Assignee:

QUALCOMM Incorporated, San Diego, CA (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 21/00 (2006.01); H03K 23/00 (2006.01); H03K 25/00 (2006.01); H03K 21/02 (2006.01); H03K 3/3562 (2006.01); H03K 3/037 (2006.01);
U.S. Cl.
CPC ...
H03K 21/026 (2013.01); H03K 3/0372 (2013.01); H03K 3/3562 (2013.01);
Abstract

The present disclosure describes current steering phase control for current-mode logic (CML) circuits. In some aspects, a circuit for frequency division comprises a current sink connected to a ground rail. The circuit also includes first and second current-carrying branches of frequency-dividing circuitry operably connected to respective load resistors, which are connected to a power rail. A first switch element of the circuit is connected between the current sink and the first current-carrying branch and a second switch element of the circuit is connected between the current sink and the second current-carrying branch. The first and second switch elements may steer current sank by the current sink between the first and second current-carrying branches effective to alter a phase of a signal provided by the frequency division circuit.


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