JPS5144407A - - Google Patents
Info
- Publication number
- JPS5144407A JPS5144407A JP50097238A JP9723875A JPS5144407A JP S5144407 A JPS5144407 A JP S5144407A JP 50097238 A JP50097238 A JP 50097238A JP 9723875 A JP9723875 A JP 9723875A JP S5144407 A JPS5144407 A JP S5144407A
- 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
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Complex Calculations (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/496,695 US3934097A (en) | 1974-08-12 | 1974-08-12 | Multifrequency tone detection |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5144407A true JPS5144407A (ja) | 1976-04-16 |
Family
ID=23973732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50097238A Pending JPS5144407A (ja) | 1974-08-12 | 1975-08-12 |
Country Status (7)
Country | Link |
---|---|
US (1) | US3934097A (ja) |
JP (1) | JPS5144407A (ja) |
CA (1) | CA1034210A (ja) |
DE (1) | DE2535730A1 (ja) |
FR (1) | FR2282202A1 (ja) |
GB (1) | GB1510859A (ja) |
SE (1) | SE7508732L (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58192658U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
JPS58192659U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
JPS58192656U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4135150A (en) * | 1977-08-12 | 1979-01-16 | Ledex, Inc. | Decoder circuit for detecting sequentially presented code digit signals |
US4351032A (en) * | 1978-12-04 | 1982-09-21 | General Electric Company | Frequency sensing circuit |
US4352194A (en) * | 1980-07-25 | 1982-09-28 | Rca Corporation | System and method for frequency discrimination |
GB2198568A (en) * | 1986-12-12 | 1988-06-15 | Motorola Israel Ltd | Current tone detection |
JP3452430B2 (ja) * | 1995-09-11 | 2003-09-29 | 富士通株式会社 | 情報信号検出装置および情報信号検出方法 |
US5905755A (en) * | 1996-07-17 | 1999-05-18 | Northern Telecom Limited | Method and circuit for data regeneration of a data stream |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3441682A (en) * | 1965-05-28 | 1969-04-29 | Bell Telephone Labor Inc | Multifrequency signal receiver with compensation for power source variations |
FR1488289A (fr) * | 1966-04-04 | 1967-07-13 | Cit Alcatel | Procédé et dispositif pour l'identification des fréquences par des circuits logiques |
FR94830E (fr) * | 1966-04-04 | 1969-11-28 | Cit Alcatel | Procédé et dispositif pour l'identification des fréquences par des circuits logiques. |
US3578919A (en) * | 1968-12-30 | 1971-05-18 | Bell Telephone Labor Inc | Time compression tone detector |
-
1974
- 1974-08-12 US US05/496,695 patent/US3934097A/en not_active Expired - Lifetime
-
1975
- 1975-04-30 CA CA225,942A patent/CA1034210A/en not_active Expired
- 1975-08-01 SE SE7508732A patent/SE7508732L/xx unknown
- 1975-08-05 GB GB32704/75A patent/GB1510859A/en not_active Expired
- 1975-08-11 DE DE19752535730 patent/DE2535730A1/de not_active Withdrawn
- 1975-08-11 FR FR7524961A patent/FR2282202A1/fr active Granted
- 1975-08-12 JP JP50097238A patent/JPS5144407A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58192658U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
JPS58192659U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
JPS58192656U (ja) * | 1982-06-18 | 1983-12-21 | 三菱製紙株式会社 | 電子写真用液体現像装置 |
Also Published As
Publication number | Publication date |
---|---|
FR2282202A1 (fr) | 1976-03-12 |
SE7508732L (sv) | 1976-02-13 |
FR2282202B1 (ja) | 1980-09-05 |
DE2535730A1 (de) | 1976-03-04 |
GB1510859A (en) | 1978-05-17 |
CA1034210A (en) | 1978-07-04 |
US3934097A (en) | 1976-01-20 |