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:
Jun. 14, 1983
Filed:
Jan. 19, 1981
Applicant:
Inventor:
Ramanatha V Balakrishnan, San Jose, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365-8 ;
Abstract
A bubble sense amplifier has a biasing circuit for adjusting the bias currents through magneto-resistive detectors so as to establish a preferred common mode operating voltage across the bubble detectors. The preamplifier is coupled through a junction capacitance circuit to a clamp-and-strobe circuit and to a differential comparator. The differential comparator has a selectable threshold voltage, and compares the differential bubble signal to the selected threshold voltage.