JPS5641034B2 - - Google Patents
Info
- Publication number
- JPS5641034B2 JPS5641034B2 JP2189376A JP2189376A JPS5641034B2 JP S5641034 B2 JPS5641034 B2 JP S5641034B2 JP 2189376 A JP2189376 A JP 2189376A JP 2189376 A JP2189376 A JP 2189376A JP S5641034 B2 JPS5641034 B2 JP S5641034B2
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
- H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/565,487 US3959604A (en) | 1975-04-07 | 1975-04-07 | Digital calling signal tone generating circuitry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51118307A JPS51118307A (en) | 1976-10-18 |
| JPS5641034B2 true JPS5641034B2 (en, 2012) | 1981-09-25 |
Family
ID=24258824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51021893A Granted JPS51118307A (en) | 1975-04-07 | 1976-03-02 | Device for generating call signal tone |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3959604A (en, 2012) |
| JP (1) | JPS51118307A (en, 2012) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832837U (ja) * | 1981-08-27 | 1983-03-03 | ナショナル住宅産業株式会社 | 笠木取付け構造 |
| JPH0424925U (en, 2012) * | 1990-06-23 | 1992-02-28 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4315108A (en) * | 1975-09-29 | 1982-02-09 | Mostek Corporation | Integrated circuit chip telephone communication system |
| US4110567A (en) * | 1977-03-14 | 1978-08-29 | International Standard Electric Corporation | Multi-frequency generator using digital technique |
| JPS54130809A (en) * | 1978-04-03 | 1979-10-11 | Nec Corp | Pulse code modulation signal generator |
| US4259648A (en) * | 1979-07-11 | 1981-03-31 | Bell Telephone Laboratories, Incorporated | One-bit frequency-shift-keyed modulator |
| GB2066628B (en) * | 1979-12-21 | 1984-04-04 | Philips Electronic Associated | Circuit arrangement for transmitting binary data elements as two tone frequences |
| US4349704A (en) * | 1979-12-31 | 1982-09-14 | Bell Telephone Laboratories, Incorporated | Digital multifrequency signal generator |
| KR100206473B1 (ko) | 1996-12-31 | 1999-07-01 | 윤종용 | 전자교환기의 톤 발생장치 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL267564A (en, 2012) * | 1960-08-22 | |||
| US3288940A (en) * | 1963-10-24 | 1966-11-29 | Automatic Elect Lab | Multifrequency signal receiver |
| US3456085A (en) * | 1965-07-14 | 1969-07-15 | Bell Telephone Labor Inc | Telephone repertory dialer |
| US3381276A (en) * | 1965-09-15 | 1968-04-30 | Photo Magnetic Syst Inc | Computer systems |
| US3515792A (en) * | 1967-08-16 | 1970-06-02 | North American Rockwell | Digital organ |
| US3772681A (en) * | 1970-10-14 | 1973-11-13 | Post Office | Frequency synthesiser |
| US3816635A (en) * | 1971-05-28 | 1974-06-11 | Baldwin Co D H | Single master tone generator |
| GB1337166A (en) * | 1971-10-28 | 1973-11-14 | Marconi Co Ltd | Frequency generators |
| US3882751A (en) * | 1972-12-14 | 1975-05-13 | Nippon Musical Instruments Mfg | Electronic musical instrument employing waveshape memories |
-
1975
- 1975-04-07 US US05/565,487 patent/US3959604A/en not_active Expired - Lifetime
-
1976
- 1976-03-02 JP JP51021893A patent/JPS51118307A/ja active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832837U (ja) * | 1981-08-27 | 1983-03-03 | ナショナル住宅産業株式会社 | 笠木取付け構造 |
| JPH0424925U (en, 2012) * | 1990-06-23 | 1992-02-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| US3959604A (en) | 1976-05-25 |
| JPS51118307A (en) | 1976-10-18 |