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. 14, 1992
Filed:
Oct. 16, 1989
Kou-Su Chen, Fremont, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A constant time delay circuit which is insensitive to variations in temperature and has no D.C. power disipation includes a temperature-insensitive reference current source (12) for dynamically charging and discharging a capacitive load (M5), a polysilicon resistor (16), and at least one time delay control circuit (14) to produce a constant time delay. In an alternate embodiment, there is provided a temperature self-compensated programmable delay circuit which includes electrically programmable resistor means (30) for adjusting the total resistance in a temperature-insensitive reference current source (12b). As a result, the amount of the reference current is controlled so as to obtain a desired delay time.