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. 10, 1981
Filed:
Feb. 11, 1980
Ruben Wever, San Jose, CA (US);
Daniel C Moyles, Saratoga, CA (US);
Wiltron Company, Mountain View, CA (US);
Abstract
A measurement method and apparatus for determining the duration of a current signaling pulse in a telephone circuit, without breaking or interrupting the circuit, through observing a voltage waveform across the circuit, even though the voltage waveform is distorted by characteristics of the circuit and components attached to it. According to one embodiment, the derivative of the voltage pulse is electronically taken to identify the leading and trailing edges of the current pulse, a pedestal voltage added to it and then its transitions sensed. According to another embodiment, a high impedance technique is utilized which does not impair service along the communication circuit being measured, this technique sensing transitions of the voltage waveform and processing the signal to avoid the effects of any zero crossings that occur during the pulse as a result of high amplitude ringing or relay contact bounce.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile