JPS4874714A - - Google Patents
Info
- Publication number
- JPS4874714A JPS4874714A JP47129693A JP12969372A JPS4874714A JP S4874714 A JPS4874714 A JP S4874714A JP 47129693 A JP47129693 A JP 47129693A JP 12969372 A JP12969372 A JP 12969372A JP S4874714 A JPS4874714 A JP S4874714A
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Tests Of Electronic Circuits (AREA)
- Measuring Phase Differences (AREA)
- Analogue/Digital Conversion (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21220471A | 1971-12-27 | 1971-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4874714A true JPS4874714A (ja) | 1973-10-08 |
Family
ID=22789997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47129693A Pending JPS4874714A (ja) | 1971-12-27 | 1972-12-26 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3752972A (ja) |
| JP (1) | JPS4874714A (ja) |
| BE (1) | BE793242A (ja) |
| CA (1) | CA957078A (ja) |
| FR (1) | FR2166019B1 (ja) |
| GB (1) | GB1375257A (ja) |
| IT (1) | IT976153B (ja) |
| NL (1) | NL158984B (ja) |
| SE (1) | SE384576B (ja) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421873A1 (de) * | 1984-06-13 | 1985-12-19 | Brown, Boveri & Cie Ag, 6800 Mannheim | Messverfahren zur ermittlung der differenz zwischen einer wechselspannung und einer zweiten spannung sowie messvorrichtung zu seiner anwendung |
| DE3835710A1 (de) * | 1988-10-20 | 1990-05-03 | Asea Brown Boveri | Messverfahren und schaltungsanordnung zur ueberpruefung von schutzmassnahmen in wechselspannungsnetzen |
| DE3835677C2 (de) * | 1988-10-20 | 1997-07-17 | Metrawatt Gmbh Gossen | Meßverfahren und Schaltungsanordnung zur Ermittlung des Auslösestroms von FI-Schaltern |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1170685B (de) * | 1960-05-21 | 1964-05-21 | Telefunken Patent | Elektronische Anordnung zur Analog-Division |
| US3466460A (en) * | 1967-01-20 | 1969-09-09 | Weston Instruments Inc | Time division multiplier |
| GB1239922A (en) * | 1967-04-27 | 1971-07-21 | K D G Instr Ltd | Modulated pulse computing circuits |
| US3550022A (en) * | 1968-09-04 | 1970-12-22 | Bendix Corp | Divider circuit |
| US3502983A (en) * | 1968-11-20 | 1970-03-24 | Bell Telephone Labor Inc | Signal peak-to-average ratio detector |
| US3652930A (en) * | 1969-03-06 | 1972-03-28 | Yokogawa Electric Works Ltd | Ratio measuring apparatus |
| US3636332A (en) * | 1970-07-22 | 1972-01-18 | Gen Motors Corp | Divider-multiplier circuit |
-
0
- BE BE793242D patent/BE793242A/xx unknown
-
1971
- 1971-12-27 US US00212204A patent/US3752972A/en not_active Expired - Lifetime
-
1972
- 1972-07-07 CA CA146,600A patent/CA957078A/en not_active Expired
- 1972-12-18 SE SE7216555A patent/SE384576B/xx unknown
- 1972-12-21 GB GB5901472A patent/GB1375257A/en not_active Expired
- 1972-12-22 NL NL7217548.A patent/NL158984B/xx unknown
- 1972-12-22 IT IT71078/72A patent/IT976153B/it active
- 1972-12-26 JP JP47129693A patent/JPS4874714A/ja active Pending
- 1972-12-26 FR FR7246162A patent/FR2166019B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE384576B (sv) | 1976-05-10 |
| BE793242A (fr) | 1973-04-16 |
| CA957078A (en) | 1974-10-29 |
| DE2262606B2 (de) | 1975-10-16 |
| NL7217548A (ja) | 1973-06-29 |
| US3752972A (en) | 1973-08-14 |
| NL158984B (nl) | 1978-12-15 |
| FR2166019A1 (ja) | 1973-08-10 |
| GB1375257A (ja) | 1974-11-27 |
| IT976153B (it) | 1974-08-20 |
| FR2166019B1 (ja) | 1975-03-28 |
| DE2262606A1 (de) | 1973-07-05 |