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:
Mar. 28, 1978
Filed:
Jun. 29, 1976
Applicant:
Inventor:
Michael F Braitberg, Larkspur, CO (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 68 ; 360 66 ;
Abstract
A magnetic recording head driving circuit includes a single operational differential amplifier which mixes the bias signals with the data signals, the signal level of the two signals being separately controlled. The output of the amplifier is applied to the recording head through an impedance matching network. The impedance matching network converts the relatively high inductive impedance of the head to a substantially and effectively resistive load, matching the output impedance of the amplifier at the frequency of the bias signal.