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. 04, 1996
Filed:
Nov. 30, 1994
William A Phillips, Royal Oak, MI (US);
Clyde A Marlow, Ann Arbor, MI (US);
SGS-Thomson Microelectronics, Inc., Carrollton, TX (US);
Abstract
A circuit and method for generating a power-on reset signal with a designable hysteresis is disclosed. The circuit includes a low voltage stage, a high voltage stage, and a hysteresis stage. The low voltage stage includes a resistor in series with a current mirror. The high voltage stage includes a current mirror in series with a diode and two resistors. The hysteresis circuit includes a transistor connected across one of the two resistors. The method for generating the power-on reset signal includes the steps of sinking a power-on reset signal low when a voltage source reaches a first V.sub.be voltage threshold; driving the power-on reset signal high when the voltage source reaches a second threshold value; and providing hysteresis to the power-on reset signal.