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. 10, 1982
Filed:
Oct. 24, 1980
William D Huber, San Jose, CA (US);
Sperry Corporation, New York, NY (US);
Abstract
A pulse improvement circuit for a magnetic readback system produces a data representative signal having symmetrical, equal-amplitude pulses of limited time widths. The circuit includes an equalizer made in accordance to a final transfer function produced as a result of a mathematical convolution of first and second transfer functions. The first transfer function is based on the theory of a matched filter for receiving a signal having data representative and non-white noise pulses contained therein to produce a filter signal having maximum signal to noise ratio. The second transfer function is based on the theory of a Papoulis window function for slimming the pulses contained in the filter signal. A specific circuit implementation of the final transfer function is an eight-pole, inductor-capacitor, ladder network for amplitude equalization coupled to an inductor-capacitor, lattice network including first and second order sections for phase equalization.