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:
Apr. 08, 1997
Filed:
Aug. 29, 1995
Jaswinder S Jandu, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An integrated circuit (20) includes a low voltage inhibit (LVI) circuit (21) to protect an internal circuit (22) against losses in power supply voltage. The LVI circuit (21) includes primary (30) and secondary (35) LVI circuits. The primary LVI circuit (30) is a high-precision analog circuit which is selectively enabled when the secondary LVI circuit (35) senses that the power supply voltage is approaching a critical range. The primary LVI circuit (30) resets an internal circuit (22) of the integrated circuit (20) when it senses the power supply voltage falling below a critical level. Thus, the higher current primary LVI circuit (30) need only be enabled when a more precise power supply voltage measurement is required. The LVI circuit (21) also includes a disabling circuit (40) which latches an active output of the primary LVI circuit (30) and then disables the primary LVI circuit (30).