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. 12, 1981
Filed:
Jun. 21, 1979
Applicant:
Inventor:
Stephen L Smith, Tempe, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323313 ; 307297 ; 307304 ; 330253 ;
Abstract
An NMOS voltage regulator circuit generates a reference voltage for comparison with, for example, TTL logic levels. A resistive voltage divider coupled to a 5 volt source produces a voltage of, for example, 1.5 volts which is applied to the non-inverting input of a differential amplifier. The reference voltage appears at the inverting input of the differential amplifier. Field effect transistor means are provided to raise or lower the voltage at the inverting input depending on whether a negative or positive excursion has taken place.