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:
Nov. 19, 1996
Filed:
Jun. 06, 1995
Kazuo Hushimi, Tokyo, JP;
Masahiko Kuwata, Tokyo, JP;
JEOL Ltd., Tokyo, JP;
JEOL Engineering Co. Ltd., Tokyo, JP;
Abstract
There is disclosed a rectangular filter which has a simple configuration and is capable of producing an improved rectangular wave. An input step wave is differentiated by a differentiator circuit and amplified by a first amplifier. The output from the amplifier is inverted by an inverting amplifier having a gain of -1. The output from the first amplifier is integrated by an integrator circuit having a time constant equal to the time constant of the differentiator circuit. The output from the inverting amplifier and the output from the integrator circuit are summed up by an adding circuit. The input signal is faithfully reproduced at the output of the adding circuit. After a given time passes since the input signal has been applied, the capacitor of the integrator circuit is shorted out. In this way, a rectangular wave is obtained. There is also disclosed a filter amplifier comprising this rectangular filter and a gated integrator for integrating the output from the rectangular filter for a predetermined time.