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:
Feb. 04, 2003
Filed:
Jan. 04, 2002
Jiann-Neng Chen, Weston, MA (US);
Teradyne, Inc., Boston, MA (US);
Abstract
A re-referencing circuit for re-referencing a digital input signal from a first logic environment to a second logic environment includes a non-inverting circuit having a non-inverting transfer characteristic between the input and the output. A capacitive element has a first node coupled to the input of the non-inverting circuit and a second node arranged to receive the digital input signal. A resistive element is coupled between the input and the output of the non-inverting circuit. The re-referencing circuit further includes a transient correcting circuit having a first input coupled to a substantially DC level of the first logic environment, a second input coupled to a substantially DC level of the second logic environment, and an output coupled to the input of the non-inverting circuit. The transient correcting circuit applies transient DC differences between the two environments to cancel the effects of transients in the digital input signal.