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. 24, 2000
Filed:
Nov. 29, 1999
Applicant:
Inventor:
Martin Buck, Munchen, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
326 83 ; 326112 ; 326 49 ; 327 89 ;
Abstract
An input circuit has an inverter and a differential amplifier, which are respectively connected on an input side to an input and on an output side to an output of the input circuit. The input circuit has two operating modes defined by an activation signal, the differential amplifier being activated and the inverter being deactivated in a first operating mode, and the differential amplifier being deactivated and the inverter being activated in a second operating mode. In this manner, the input circuit has the advantage of selective operation with LVTTL or SSTL levels.