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:
Feb. 04, 2003
Filed:
Nov. 02, 2000
Atsushi Minegishi, Tokyo, JP;
Iwatsu Electric Co., Ltd., Tokyo, JP;
Abstract
An analog switch circuit is disclosed. A plurality of cell switches ( ) and load resistors ( ) are employed. One of cell switches ( A) is active and another ( B) is nonactive by controlling switches ( ). Each of cells includes two pair of common-base transistors ( to ), which are inserted between a differential amplifier ( ) and load resistors ( ). Each of bases of common-base transistors ( to ) isolate the collector from the base. Thereby, effects of collector-to-emitter capacitances of nonactive transistors are decreased in high frequency range. The remarkably small leakages are canceled out by paired transistors and , and, and . Thus, the cross-talk between and is eliminated.