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:
May. 28, 2002
Filed:
Apr. 28, 2000
Yoav Lavi, Raanana, IL;
3G.com Inc., Lexington, MA (US);
Abstract
A circuit for providing a function of a plurality of consecutive bits in a shift register is provided. The circuit includes a 2-input logic gate having a first input terminal connected to receive a bit being shifted into the shift register, and a second input terminal coupled to receive a bit being shifted out of the shift register. The circuit further includes a sequential logic device having an input terminal coupled to an output terminal of the 2-input logic gate, an output terminal that provides the function, and a control terminal coupled to receive a control signal for resetting the sequential logic device. In one embodiment, the 2-input logic gate is an exclusive OR gate, and the sequential logic device is a toggle flip-flop. In this embodiment, the function is a logical exclusive OR of the consecutive bits in the shift register. The function is implemented by initializing an output signal of the sequential logic device when the consecutive bits of the shift register have a predetermined value. Then, the bit to be shifted into the shift register is compared with the bit to be shifted out of the shift register. The output signal of the sequential logic device is toggled if no match is detected, and maintained if a match is detected. In other embodiments, functions other than an exclusive OR function can be implemented.