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:
Aug. 03, 1993
Filed:
Dec. 26, 1990
Karl L Wang, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A BICMOS memory performs address transition detection on each address signal. A first ECL difference amplifier detects a low-to-high transition with a first input being the address signal, and a second input being the address signal delayed and level-shifted. A second ECL difference amplifier uses a complement of the first and second inputs to detect a high-to-low transition. The outputs of two corresponding ECL difference amplifiers for each address signal are wire-ORed together to form the address transition detection signal, which is delayed for first, second, and third predetermined times to sequentially perform row predecoding, row decoding, and block decoding, respectively. The decoding is performed by logic circuits using modified Widlar current sources, which decrease the current required except during decoding, as indicated by a corresponding address transition detection signal. The saving in current allows faster ECL circuits to be used and decreases peak current on internal power supply lines.