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:
Aug. 19, 2014
Filed:
Oct. 11, 2012
Azbil Corporation, Tokyo, JP;
Azbil Corporation, Tokyo, JP;
Abstract
A variable impedance circuit is provided as an active load between an input line L1 and an output line L2. This circuit has low impedance with respect to a DC electric current signal and has high impedance with respect to an AC electric current signal, structured from a series circuit of resistors R1, R2, and R3 connected between lines L1 and L2; a transistor Q1 having the collector connected to the line L1 and the base connected between the resistors R2 and R3; a resistor R4 connected between the emitter of the transistor Q1 and the line L2; a capacitor C1 with one end connected between the resistors R2 and R3; a resistor R5 connected between the other end of the capacitor C1 and the line L2; a capacitor C2 having one end connected between the resistors R1 and R2; and a resistor R6 connected between the other end of the capacitor C2 and the line L2.