JPS4969204A - - Google Patents
Info
- Publication number
- JPS4969204A JPS4969204A JP48102291A JP10229173A JPS4969204A JP S4969204 A JPS4969204 A JP S4969204A JP 48102291 A JP48102291 A JP 48102291A JP 10229173 A JP10229173 A JP 10229173A JP S4969204 A JPS4969204 A JP S4969204A
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
- H03B5/24—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/01—Varying the frequency of the oscillations by manual means
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7212510A NL7212510A (enExample) | 1972-09-15 | 1972-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4969204A true JPS4969204A (enExample) | 1974-07-04 |
| JPS5324241B2 JPS5324241B2 (enExample) | 1978-07-19 |
Family
ID=19816941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10229173A Expired JPS5324241B2 (enExample) | 1972-09-15 | 1973-09-12 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3916341A (enExample) |
| JP (1) | JPS5324241B2 (enExample) |
| AU (1) | AU471479B2 (enExample) |
| BE (1) | BE804831A (enExample) |
| CA (1) | CA977878A (enExample) |
| DE (1) | DE2343084C3 (enExample) |
| FR (1) | FR2200712B1 (enExample) |
| GB (1) | GB1406971A (enExample) |
| NL (1) | NL7212510A (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6356134B1 (en) * | 2000-03-21 | 2002-03-12 | International Business Machines Corporation | Universal clock generator circuit and adjustment method for providing a plurality of clock frequencies |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2120067A1 (de) * | 1970-05-15 | 1971-12-02 | Inst Fuer Nachrichtentechnik | Schaltungsanordnung zur Verhinderung der Auswertung von ausgesendeten Falschoder Fehlinformationen bei gleichzeitiger Betätigung zweier Tasten eines Tastwahlapparates in Fernsprechanlagen mit Zweifrequenz-Codewahl |
| BE788462A (fr) * | 1971-09-07 | 1973-01-02 | Western Electric Co | Generateur de signaux electriques multifrequences |
| US3720887A (en) * | 1972-02-22 | 1973-03-13 | Microsystems Int Ltd | Frequency determining network |
-
1972
- 1972-09-15 NL NL7212510A patent/NL7212510A/xx not_active Application Discontinuation
-
1973
- 1973-08-25 DE DE19732343084 patent/DE2343084C3/de not_active Expired
- 1973-08-29 US US392753A patent/US3916341A/en not_active Expired - Lifetime
- 1973-09-12 CA CA180,884A patent/CA977878A/en not_active Expired
- 1973-09-12 AU AU60247/73A patent/AU471479B2/en not_active Expired
- 1973-09-12 GB GB4278473A patent/GB1406971A/en not_active Expired
- 1973-09-12 JP JP10229173A patent/JPS5324241B2/ja not_active Expired
- 1973-09-12 FR FR7332777A patent/FR2200712B1/fr not_active Expired
- 1973-09-13 BE BE135631A patent/BE804831A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2200712A1 (enExample) | 1974-04-19 |
| GB1406971A (en) | 1975-09-17 |
| AU6024773A (en) | 1975-03-13 |
| DE2343084A1 (de) | 1974-03-21 |
| CA977878A (en) | 1975-11-11 |
| AU471479B2 (en) | 1976-04-29 |
| BE804831A (fr) | 1974-03-13 |
| JPS5324241B2 (enExample) | 1978-07-19 |
| USB392753I5 (enExample) | 1975-01-28 |
| US3916341A (en) | 1975-10-28 |
| DE2343084B2 (de) | 1977-01-27 |
| DE2343084C3 (de) | 1977-09-15 |
| NL7212510A (enExample) | 1974-03-19 |
| FR2200712B1 (enExample) | 1980-03-07 |