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:
Jan. 07, 1992
Filed:
Sep. 24, 1990
Yoshio Wada, Yokohama, JP;
Katsuji Fujita, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
Since the resistor is inserted between each of the emitters of the transistors to which the comparison voltage is applied and each of the collectors of the differential pair of transistors, a positive feedback is applied at different points where a differential input voltage is increased from the negative and it is decreased from the positive, and thus the voltage comparator circuit has the hysteresis characteristics. It is therefore possible to reliably have the hysteresis characteristics of a narrow range of voltage of 100 mV or less (for example, several tens of millivolts) without increasing the number of elements in use or depending upon the value of k.multidot.T/q (k is the Boltzmann's constant, T is an absolute temperature, and q is an amount of charge of electrons).