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. 15, 1993
Filed:
Jul. 31, 1990
Wah K Loh, Houston, TX (US);
Narasimhan Iyengar, Plano, TX (US);
Danny R Cline, Plano, TX (US);
Wah K Loh, Richardson, TX (US);
Hugh P McAdams, Houston, TX (US);
Texas Instruments, Incorporated, Dallas, TX (US);
Abstract
A circuit for providing a bias to the substrate of a dynamic memory device having a memory array and peripheral circuitry formed in a semiconductor substrate is disclosed. The circuit includes a low power pump and oscillator to provide a substrate bias in a memory standby mode. A high power pump and oscillator is included to provide a substrate bias when the memory is active. A booster oscillator and pump to provide a substrate bias when the memory is active and when the substrate voltage level is greater than a preset level is also provided. A method for contolling the voltage level of the substrate upon which a dynamic memory device is formed is also disclosed.