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. 28, 2001
Filed:
Feb. 05, 1999
Ernest P. Walker, Weston, MA (US);
Ronald A. Sartschev, Dunstable, MA (US);
Allan M. Ryan, Jr., Billerica, MA (US);
Eric D. Blom, Wakefield, MA (US);
Teradyne, Inc., Boston, MA (US);
Abstract
Pin slice circuitry used in automatic test equipment is disclosed. The pin slice circuitry includes a portion implemented using CMOS technology and a portion implemented using bipolar technology. The CMOS portion includes a plurality of timing generator circuits and sigma delta modulator circuitry, which is used to generate digital bit streams representative of analog reference levels. The bipolar portion includes driver/receiver channels, a parametric measurement unit, and decoder circuitry, which produces the analog reference levels from the digital bit streams generated by the modulator circuitry. The analog reference levels are used by the driver/receiver channels and the parametric measurement unit. The disclosed pin slice circuitry has the advantages of reduced size and cost as compared with conventional pin slice circuitry.