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:
May. 31, 1983
Filed:
Jan. 23, 1981
Applicant:
Inventor:
Barrett E Guisinger, Saratoga, CA (US);
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 46 ; 360 67 ; 360 68 ;
Abstract
A high gain, current mode preamplifier for magnetic media recording and reproduction wherein a differential amplifier has its non-inverting input connected to the circuit ground through a first resistance, its inverting input is connected to the circuit ground through a second resistance, and its output is connected to the inverting input through a third resistance, and with the magnetic head being selectively connected in parallel with the third resistance during recording and across the amplifier input terminals during playback.