JPS545923B2 - - Google Patents
Info
- Publication number
- JPS545923B2 JPS545923B2 JP2476073A JP2476073A JPS545923B2 JP S545923 B2 JPS545923 B2 JP S545923B2 JP 2476073 A JP2476073 A JP 2476073A JP 2476073 A JP2476073 A JP 2476073A JP S545923 B2 JPS545923 B2 JP S545923B2
- 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)
- Manipulation Of Pulses (AREA)
- Devices For Supply Of Signal Current (AREA)
- Electrophonic Musical Instruments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7202908A NL7202908A (en:Method) | 1972-03-04 | 1972-03-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS48102964A JPS48102964A (en:Method) | 1973-12-24 |
| JPS545923B2 true JPS545923B2 (en:Method) | 1979-03-23 |
Family
ID=19815514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2476073A Expired JPS545923B2 (en:Method) | 1972-03-04 | 1973-03-01 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3829783A (en:Method) |
| JP (1) | JPS545923B2 (en:Method) |
| CA (1) | CA1001235A (en:Method) |
| DE (1) | DE2308709C3 (en:Method) |
| FR (1) | FR2174937B1 (en:Method) |
| GB (1) | GB1416642A (en:Method) |
| NL (1) | NL7202908A (en:Method) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155542U (en:Method) * | 1985-03-18 | 1986-09-26 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995123A (en) * | 1974-01-09 | 1976-11-30 | Wilson Charles H | Telephone calculator |
| US3946164A (en) * | 1974-05-28 | 1976-03-23 | Gte Automatic Electric Laboratories Incorporated | Precise tone signal generator |
| US4031329A (en) * | 1974-06-13 | 1977-06-21 | International Telephone And Telegraph Corporation | Time limited telephone paging employs a relay switch actuated by dual frequency tone |
| US4025865A (en) * | 1976-01-08 | 1977-05-24 | General Instrument Corporation | Frequency-signalling circuit for a telephone |
| HU191731B (en) * | 1984-12-19 | 1987-04-28 | Telefongyar | Circuit arrangement for generating system carrier, line pilot and channel carrier-control frequencies of multichannel open cable telephon equipments |
| HU191730B (en) * | 1984-12-19 | 1987-04-28 | Telefongyar | Circuit arrangement for generating channel carrier, pilot, system carrier and carrier-receiver frequencies of the multichannel carrier-current telephone equipments of premodulation system |
| JP2001186039A (ja) * | 1999-12-27 | 2001-07-06 | Sony Corp | 受信用ｉｃおよびこれを使用した受信機 |
| JP4666456B2 (ja) * | 2004-09-16 | 2011-04-06 | 富士通セミコンダクター株式会社 | 多相クロック生成回路 |
| DE102018222288A1 (de) * | 2018-12-19 | 2020-06-25 | Continental Teves Ag & Co. Ohg | Hochfrequenzgenerator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1496141A (fr) * | 1966-06-03 | 1967-09-29 | Cit Alcatel | Générateur d'ondes modulées en fréquence |
| FR1569618A (en:Method) * | 1967-12-08 | 1969-06-06 | ||
| US3590131A (en) * | 1969-02-11 | 1971-06-29 | Robert R Reyers | Electronic musical scale generator employing a single master oscillator |
| US3610801A (en) * | 1970-02-16 | 1971-10-05 | Triadex Inc | Digital music synthesizer |
| US3657657A (en) * | 1970-08-03 | 1972-04-18 | William T Jefferson | Digital sine wave generator |
| US3671871A (en) * | 1970-12-14 | 1972-06-20 | Northrop Corp | Signal frequency synthesizer |
-
1972
- 1972-03-04 NL NL7202908A patent/NL7202908A/xx not_active Application Discontinuation
-
1973
- 1973-02-22 DE DE2308709A patent/DE2308709C3/de not_active Expired
- 1973-02-26 US US00335673A patent/US3829783A/en not_active Expired - Lifetime
- 1973-02-28 CA CA164,801A patent/CA1001235A/en not_active Expired
- 1973-03-01 GB GB996573A patent/GB1416642A/en not_active Expired
- 1973-03-01 JP JP2476073A patent/JPS545923B2/ja not_active Expired
- 1973-03-02 FR FR7307538A patent/FR2174937B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61155542U (en:Method) * | 1985-03-18 | 1986-09-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2174937B1 (en:Method) | 1976-11-05 |
| JPS48102964A (en:Method) | 1973-12-24 |
| NL7202908A (en:Method) | 1973-09-07 |
| FR2174937A1 (en:Method) | 1973-10-19 |
| DE2308709C3 (de) | 1978-06-29 |
| CA1001235A (en) | 1976-12-07 |
| GB1416642A (en) | 1975-12-03 |
| US3829783A (en) | 1974-08-13 |
| DE2308709B2 (de) | 1977-11-03 |
| DE2308709A1 (de) | 1973-09-13 |