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. 10, 1983
Filed:
Nov. 25, 1981
Applicant:
Inventor:
Barrett E Guisinger, Saratoga, CA (US);
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318254 ; 318138 ;
Abstract
A motor drive circuit comprising a differential amplifier having inverting and non-inverting inputs and further having an output which is connected to the inputs of separate NPN and PNP, super-alpha configured amplifiers whose combined outputs are supplied to one lead of a motor. The other lead of the motor is connected through a resistor to the circuit ground. The voltage developed across this resistor is supplied to the inverting input of the differential amplifier such that the current through the motor will be equal to the input voltage supplied to the non-inverting input of the differential amplifier divided by the resistance of the resistor.