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:
Oct. 14, 2025
Filed:
Mar. 15, 2021
Shanghai Chenzhu Instrument Co., Ltd., Shanghai, CN;
SHANGHAI CHENZHU INSTRUMENT CO., LTD., Shanghai, CN;
Abstract
A bidirectional transmission circuit for a universal signal, comprising an intrinsically safe energy limiting module, a first signal coupling module, an isolation transformer module, a second signal coupling module and a control module; the first signal coupling module adjusts a first direct current signal of a universal signal to a first alternating current signal, the isolation transformer module transmits the first alternating current signal to the second signal coupling module in an isolation manner, and the second signal coupling module adjusts the first alternating current signal to a second direct current signal to a universal signal receiving terminal; the second signal coupling module further adjusts a third direct current signal of a control signal to a second alternating current signal, and the first signal coupling module further adjusts the second alternating current signal to a fourth direct current signal to a control signal receiving terminal.