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. 09, 1977
Filed:
Apr. 12, 1976
Applicant:
Inventor:
Robert R Parker, Des Plaines, IL (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 67 ; 360 66 ;
Abstract
A playback preamplifier for use on a recording machine utilizing a magnetic recording medium to provide a substantially flat response between a general range of 200 to 6000 Hz. and having a substantially improved signal-to-noise ratio. The circuit includes a three stage amplifier having an overall DC feedback loop. The magnetic transducer is connected in the feedback loop so that the DC feedback current biases the transducer with the DC feedback current.
Parker, Robert. (1977). Low noise magnetic transducer preamplifier having flat response (U.S. Patent No. 4041538). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4041538
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile