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:
Oct. 31, 1989
Filed:
Jun. 14, 1988
Applicant:
Inventor:
William M Needles, Arlington, TX (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341101 ; 341 63 ;
Abstract
A transmit circuit provides for multi-protocol operation without the need for two distinct transmitter units. This is accomplished by providing a transfer gate multiplexer at the data input to a shift register under transmitter control. Each of the elements of the multiplexer receives as inputs both a data bit from the normal bit sequence and a juxtaposed data bit from a corresponding bit sequence that has been 'flipped' end-for-end. Steering logic then selects which of the two protocols will be provided to the shift register for transmission.