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:
Jul. 18, 1995
Filed:
Aug. 23, 1994
David W Howard, Cherry Hinton, GB;
Advanced Risc Machines Limited, Cambridge, GB;
Abstract
An output signal driver is described in which a functional block 10, such as a random access memory, provides a data signal to one input of a multiplexer 26 and then via a buffer stage 24 to an output signal line 6. The other input of the multiplexer 26 receives a recirculated value from the output signal line 6. In operation, the buffer stage 24 is enabled as soon as the functional block 10 is enabled. A data valid signal dv indicating when the data signal from the functional block is ready for output is used to switch the multiplexer 26 from selecting the recirculated value to selecting the new data signal value. The output signal on the output signal line 6 is made to always have a defined state derived from the existing output signal level or, when it becomes available, the new data signal. Power wastage through the driving of spurious signals on the output signal line 6 is thus avoided.