MD629Y - Ohmmeter - Google Patents

Ohmmeter Download PDF

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Publication number
MD629Y
MD629Y MDS20120177A MD629Y MD 629 Y MD629 Y MD 629Y MD S20120177 A MDS20120177 A MD S20120177A MD 629 Y MD629 Y MD 629Y
Authority
MD
Moldova
Prior art keywords
input
terminal
output
converter
resistance
Prior art date
Application number
Other languages
Moldavian (mo)
Romanian (ro)
Inventor
Vitalie Nastas
Pavel Nicolaev
Original Assignee
Univ Tehnica Moldovei
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 Univ Tehnica Moldovei filed Critical Univ Tehnica Moldovei
Priority to MDS20120177A priority Critical patent/MD629Z/en
Publication of MD629Y publication Critical patent/MD629Y/en
Publication of MD629Z publication Critical patent/MD629Z/en

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  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention relates to the measurement technique and can be used for high-precision measurement of resistance.The ohmmeter contains two terminals (3, 4) for connection of the measured object, a resistor (2) having one pole connected to the first terminal (3), a constant-current source (1), to one terminal of which is connected the second pole of the resistor (2), a converter of negative resistance (5) with an input for controlling the reproduced resistance, a control input and two outputs, one of which is connected to the second terminal (4) and the second input - to the second terminal of the current source (1), a voltage comparator (6), having one input connected to the first terminal (3), and the second input - to the common point of the converter (5) and the current source (1). The ohmmeter also contains a counting pulse generator with stable frequency (7), an AND gate (8) with one output and two inputs, one of which is connected to the output of the comparator (6), and the second input - to the output of the generator (7), a digital indication unit (9), having its input connected to the output of the AND gate (8) and to the control input of the converter (5). The control input of the converter (5) is digital, and control of reproducible resistance is obtained by means of counting pulses from the output of the AND gate (8).
MDS20120177A 2012-12-14 2012-12-14 Ohmmeter MD629Z (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MDS20120177A MD629Z (en) 2012-12-14 2012-12-14 Ohmmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MDS20120177A MD629Z (en) 2012-12-14 2012-12-14 Ohmmeter

Publications (2)

Publication Number Publication Date
MD629Y true MD629Y (en) 2013-04-30
MD629Z MD629Z (en) 2013-11-30

Family

ID=48227618

Family Applications (1)

Application Number Title Priority Date Filing Date
MDS20120177A MD629Z (en) 2012-12-14 2012-12-14 Ohmmeter

Country Status (1)

Country Link
MD (1) MD629Z (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD2248C2 (en) * 2001-12-14 2004-02-29 Виталие НАСТАС Device for impedance components measurement
MD2463G2 (en) * 2003-10-16 2004-12-31 Технический университет Молдовы Device for measuring the impedance components
MD2645G2 (en) * 2004-07-16 2005-08-31 Технический университет Молдовы Device for measuring the linear resistance of the insulated wire
MD2866G2 (en) * 2004-12-17 2006-05-31 Технический университет Молдовы Impedance meter
MD3216G2 (en) * 2006-03-21 2007-07-31 Технический университет Молдовы Device for measuring the linear resistance of the insulated wire
MD279Z (en) * 2010-03-26 2011-04-30 Технический университет Молдовы Impedance meter
MD590Z (en) * 2011-11-08 2013-08-31 Технический университет Молдовы Ohmmeter
  • 2012

Also Published As

Publication number Publication date
MD629Z (en) 2013-11-30

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Legal Events

Date Code Title Description
FG9Y Short term patent issued
KA4Y Short-term patent lapsed due to non-payment of fees (with right of restoration)