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:
Jan. 30, 1990
Filed:
Oct. 02, 1987
Ruediger Hofmann, Gilching, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
In a crosspoint matrix, column lines are formed by two signal conductors connected to difference outputs of differential line drivers which are connected by switch element pairs of transistors to row lines, the row lines also each formed by two signal conductors. The two signal conductors of each row line are respectively connected to two outputs of a differential amplifier operating in a trigger mode. Each of the switch elements, includes a switching transistor having its control electrode charged with a through-connect or an inhibit signal and having its main electrode connected to an matrix output line and an auxiliary transistor forming a series circuit with the switching transistor. The auxiliary transistor has its control electrode connected to a matrix input line and its main electrode connected away from the series circuit connected to ground by a sampling transistor. The matrix output conductor is connected to an operating potential by way of a precharging transistor. Precharging and sampling transistors are oppositely driven with a switching matrix network selection clock which sub-divides a bit through-connect time interval into a precharging phase and an actual through-connect phase.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile