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:
Sep. 25, 2018
Filed:
Nov. 02, 2006
Eizo Kawato, Kizugawa, JP;
Eizo Kawato, Kizugawa, JP;
SHIMADZU CORPORATION, Nakagyo-ku, Kyoto, JP;
Abstract
The present invention is provided to reduce the distortion or delay of the input waveform of a high-speed analog signal due to the capacitance of a protection element inserted for the purpose of ESD protection in an input circuit for a high-speed analog signal, so as to determine the correct waveform of the high-speed analog signal. In an input protection circuit for a high-speed analog signal, a resistor is provided on a signal path connecting an input connector and an input circuit; a polymer ESD protection element is connected between a portion of the signal path, which extends from the resistor to the input connector, and the ground; a semiconductor ESD protection element is connected between a portion of the signal path, which extends from the resistor to the input circuit, and either the ground or power source; and the sum of the resistance value of an input resistor of the input circuit and the resistance value of the resistor is equal to the characteristic impedance of a high-speed analog signal input.