TW200639416A - Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof - Google Patents

Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof

Info

Publication number
TW200639416A
TW200639416A TW094115038A TW94115038A TW200639416A TW 200639416 A TW200639416 A TW 200639416A TW 094115038 A TW094115038 A TW 094115038A TW 94115038 A TW94115038 A TW 94115038A TW 200639416 A TW200639416 A TW 200639416A
Authority
TW
Taiwan
Prior art keywords
current
circuit
protection module
high voltage
steady current
Prior art date
Application number
TW094115038A
Other languages
Chinese (zh)
Other versions
TWI277743B (en
Inventor
Shr-Chau Li
Original Assignee
Picotest Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Picotest Corp filed Critical Picotest Corp
Priority to TW94115038A priority Critical patent/TWI277743B/en
Publication of TW200639416A publication Critical patent/TW200639416A/en
Application granted granted Critical
Publication of TWI277743B publication Critical patent/TWI277743B/en

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  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

A resistance measurement apparatus includes a circuit that providing steady current with high voltage isolation; a voltage measurement unit which can measure the two end voltages of the resistances being tested; a calculating unit; a circuit with steady current and high voltage isolation including a current generator with providing steady current and a protection module. The current that generated by current generator can be put out to the protection module then the resistance being tested, and the protection module by means of its internal diode for impeding positive input voltage. When negative input voltage is applied to the system, the current-guiding unit of the protection module is brought into the non-conduction state for impeding negative voltage flow into the current generator, and the protection element of the protection module can be conducted while negative voltage is applied, thus the system applying said negative voltage on the loaded unit and connected to ground. The current is divided into the calculating unit with a difference of the two voltages, thus to obtain the resistance value of the resistance being tested.
TW94115038A 2005-05-10 2005-05-10 Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof TWI277743B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94115038A TWI277743B (en) 2005-05-10 2005-05-10 Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94115038A TWI277743B (en) 2005-05-10 2005-05-10 Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof

Publications (2)

Publication Number Publication Date
TW200639416A true TW200639416A (en) 2006-11-16
TWI277743B TWI277743B (en) 2007-04-01

Family

ID=38626028

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94115038A TWI277743B (en) 2005-05-10 2005-05-10 Circuit providing steady current with high voltage isolation and resistance measurement apparatus with circuit thereof

Country Status (1)

Country Link
TW (1) TWI277743B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI461706B (en) * 2011-09-12 2014-11-21 Nidec Read Corp Impedance measurement device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI461706B (en) * 2011-09-12 2014-11-21 Nidec Read Corp Impedance measurement device

Also Published As

Publication number Publication date
TWI277743B (en) 2007-04-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees