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. 16, 2004
Filed:
Jun. 23, 2003
Kuok Ling, Calabasas, CA (US);
Martin Kulas, Westlake Village, CA (US);
Teradyne, Inc., Boston, MA (US);
Abstract
A duty cycle correction circuit for changing the duty cycle for a differential periodic signal is disclosed. The duty cycle correction circuit includes input circuitry for receiving a first differential signal. The differential signal exhibits a first signal component and a complement signal component, each of the components having initial high and low signal levels and respective first and second DC bias levels. The input circuitry includes a differential output having a first path for propagating the first signal component and a second path for propagating the complement signal component. Programmable load circuitry couples to the differential output and includes a programmable input. The load circuitry operates to programmably vary the DC bias level of at least one of the signal components. A differential gain amplifier is coupled to the first differential output and disposed downstream of the load circuitry.