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. 30, 1989
Filed:
Nov. 17, 1987
Applicant:
Inventor:
Hung-Cheng Hsieh, Sunnyvale, CA (US);
Assignee:
Xilinx, Inc., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307473 ; 307242 ; 307448 ; 307469 ; 307475 ;
Abstract
A bidirectional buffer having a high impedance state is provided. This buffer is used for amplifying a signal as it is passed from one transmission line to another when it is desirable to select which direction the signal will flow. A switching circuit controls which transmission line is connected to the input terminal of the buffer and which is connected to the output terminal. A high impedance state is also provided for disconnecting the two transmission lines. Two memory cells control the direction of signal flow and the high impedance state.