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:
Sep. 03, 1985
Filed:
Jul. 27, 1984
Yukinobu Ishigaki, Tokyo, JP;
Kazutoshi Hirohashi, Yokohama, JP;
Abstract
In a noise reduction circuit, a sampling pulse is generated for operating a switch in time-coincident relationship with the portion of a signal which is affected by a noise impulse. The signal, applied to an input terminal, is normally passed through the switch to a junction between a capacitor and a noninverting amplifier and is blocked when the switch opens in response to the sampling pulse. A differentiator is connected in a feedback circuit from the output of the noninverting amplifier to the input thereof. The differentiator is disabled when the switch remains closed and when the switch opens in response to the sampling pulse it begins differentiating a voltage which occurred immediately prior to the detection of the noise and supplies it to the capacitor to linearly interpolate the portion of the information signal which is disrupted by the noise impulse.