ES8604379A1 - Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding) - Google Patents

Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES8604379A1
ES8604379A1 ES535908A ES535908A ES8604379A1 ES 8604379 A1 ES8604379 A1 ES 8604379A1 ES 535908 A ES535908 A ES 535908A ES 535908 A ES535908 A ES 535908A ES 8604379 A1 ES8604379 A1 ES 8604379A1
Authority
ES
Spain
Prior art keywords
circuit
translation
machine
test tables
legally binding
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES535908A
Other languages
Spanish (es)
Other versions
ES535908A0 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Priority to ES535908A priority Critical patent/ES8604379A1/en
Publication of ES535908A0 publication Critical patent/ES535908A0/en
Publication of ES8604379A1 publication Critical patent/ES8604379A1/en
Expired legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

CIRCUIT FOR THE FEEDING OF TEST TABLES IN TELEPHONE POWER PLANTS, WHICH TAKING THE EXISTING POTENTIAL AT SUCH TEST TABLES, CONVERTS IT TO OTHER TWO LEVELS OF TENSION, NECESSARY FOR THE OPERATION OF EXISTING MEASURING EQUIPMENT. IT INCLUDES AN ELECTRONIC CIRCUIT THAT INCLUDES RESISTORS R1 AND R2 THAT POLARIZE TRANSISTORS TR1 AND TR2, THROUGH WHICH A SQUARE WAVE IS GENERATED IN THE PRIMARY OF THE TRANSFORMER TRA; A C2 CAPACITOR THAT, TOGETHER WITH RESISTANCE R1, SETS THE FREQUENCY OF THE SIGNAL GENERATED IN TRA; A C4 CAPACITOR THAT FILTERS THE SIGNAL; AND A D3 DIODE THAT PROTECTS THE CIRCUIT AGAINST POLARITY INVESTMENTS. (Machine-translation by Google Translate, not legally binding)
ES535908A 1984-09-14 1984-09-14 Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding) Expired ES8604379A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES535908A ES8604379A1 (en) 1984-09-14 1984-09-14 Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES535908A ES8604379A1 (en) 1984-09-14 1984-09-14 Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding)

Publications (2)

Publication Number Publication Date
ES535908A0 ES535908A0 (en) 1985-12-01
ES8604379A1 true ES8604379A1 (en) 1985-12-01

Family

ID=8487870

Family Applications (1)

Application Number Title Priority Date Filing Date
ES535908A Expired ES8604379A1 (en) 1984-09-14 1984-09-14 Circuit for feeding test tables in telephone plants (Machine-translation by Google Translate, not legally binding)

Country Status (1)

Country Link
ES (1) ES8604379A1 (en)

Also Published As

Publication number Publication date
ES535908A0 (en) 1985-12-01

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