Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CURRENT SAMPLING AND HOLDING CIRCUIT AND SIGNAL ACQUISITION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/032327
Kind Code:
A1
Abstract:
A current sampling and holding circuit and a signal acquisition system. The current sampling and holding circuit comprises: a cancellation circuit (21) connected in series between a VDD end and an amperometric sensor (11), and outputting a current to cancel a direct-current component in the amperometric sensor (11) according to a first enable signal; and a mirror circuit (22) connected in parallel with the serial cancellation circuit (21) and amperometric sensor (11) between the VDD end and a ground voltage, turned on according to a second enable signal opposite to the first enable signal, and performing current transmission by using a current difference obtained by a mirror current of a shunt current and an output current of the amperometric sensor (11). The current sampling and holding circuit and the signal acquisition system improve the establishment speed and reduce output noise.

Inventors:
ZHANG, Mengwen (Floor 13, Phase B Tengfei Industrial Building,Futian Free Trade Zon, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2016/095465
Publication Date:
February 22, 2018
Filing Date:
August 16, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHENZHEN GOODIX TECHNOLOGY CO., LTD. (Floor 13, Phase B Tengfei Industrial Building,Futian Free Trade Zon, Shenzhen Guangdong 0, 518000, CN)
International Classes:
G11C27/02
Foreign References:
US5023489A1991-06-11
US5760616A1998-06-02
CN1720661A2006-01-11
CN1234902A1999-11-10
Other References:
None
Attorney, Agent or Firm:
BEIJING HEADSTAY INTELLECTUAL PROPERTY INC. (5A1-2, Huajie Plaza Building No.1, Dazhongsi No.1, Haidian District Beijing 8, 100098, CN)
Download PDF: