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. 09, 1982
Filed:
Jun. 25, 1979
Heinz H Findeisen, Milford, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A peak detector circuit particularly adapted for recovering timing and data information in a binary recording system. The circuit comprises an operational amplifier having a diode-plus-resistor bridge network in a negative feedback path from the output of the operational amplifier to its inverting input. The non-inverting input of the operational amplifier is connected to a common ground. The signal whose peak is to be detected is capacitively coupled to the op-amp's inverting input and the peak detector's output is obtained at the op-amp's output. The diode bridge network comprises two pairs of diodes connected in series and a resistor to ground from the connection node of the diode pairs; in each diode pair the two diodes are connected in parallel, back-to-back. When a peak is detected, the op-amp output switches between positive and negative saturation values. This circuit has maximum gain at the signal peaks and exhibits decreased gain (and, hence, sensitivity to noise) as the signal moves off its peak; it is fast to detect the presence of a peak and presents a fixed phase delay.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile