DE2245182A1 - Monolithisch integrierter tonfrequenzoszillator fuer mehrfrequenzencode-wahl in fernmelde-, insbesondere fernsprechanlagen - Google Patents
Monolithisch integrierter tonfrequenzoszillator fuer mehrfrequenzencode-wahl in fernmelde-, insbesondere fernsprechanlagenInfo
- Publication number
- DE2245182A1 DE2245182A1 DE2245182A DE2245182A DE2245182A1 DE 2245182 A1 DE2245182 A1 DE 2245182A1 DE 2245182 A DE2245182 A DE 2245182A DE 2245182 A DE2245182 A DE 2245182A DE 2245182 A1 DE2245182 A1 DE 2245182A1
- Authority
- DE
- Germany
- Prior art keywords
- differential amplifier
- frequency oscillator
- audio frequency
- monolithically integrated
- negative feedback
- Prior art date
- 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
- 238000004891 communication Methods 0.000 title description 2
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- H03B5/26—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 frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2245182A DE2245182A1 (de) | 1972-09-14 | 1972-09-14 | Monolithisch integrierter tonfrequenzoszillator fuer mehrfrequenzencode-wahl in fernmelde-, insbesondere fernsprechanlagen |
| NL7312224A NL7312224A (enrdf_load_stackoverflow) | 1972-09-14 | 1973-09-04 | |
| ZA737225*A ZA737225B (en) | 1972-09-14 | 1973-09-11 | Improvements in or relating to monolithic integrated circuit voicefrequency oschcators |
| IT28770/73A IT993192B (it) | 1972-09-14 | 1973-09-11 | Oscillatore a frequenza fonica in circuito integrato monolitico per selezione in codice a piu frequen ze in impianti di telecomunicazio ni specie in impianti telefonici |
| FR7332758A FR2200711A1 (enrdf_load_stackoverflow) | 1972-09-14 | 1973-09-12 | |
| LU68408A LU68408A1 (enrdf_load_stackoverflow) | 1972-09-14 | 1973-09-12 | |
| AR250085A AR195943A1 (es) | 1972-09-14 | 1973-09-13 | Oscilador monolitico integrado de audio, para seleccion de frecuencia de codigo multiple en instalaciones de telecomunicaciones, particularmente en installaciones telefonicas |
| BR7112/73A BR7307112D0 (pt) | 1972-09-14 | 1973-09-13 | Aperfeicoamentos em oscilador de frequencia de voz em circuito integrado monolitico |
| JP48103703A JPS4969256A (enrdf_load_stackoverflow) | 1972-09-14 | 1973-09-13 | |
| AU60303/73A AU6030373A (en) | 1972-09-14 | 1973-09-13 | Monolithic integrated circuit voice-frequency oscillators |
| BE135664A BE804872A (fr) | 1972-09-14 | 1973-09-14 | Oscillateur basse frequence sous forme integree monolithique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2245182A DE2245182A1 (de) | 1972-09-14 | 1972-09-14 | Monolithisch integrierter tonfrequenzoszillator fuer mehrfrequenzencode-wahl in fernmelde-, insbesondere fernsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2245182A1 true DE2245182A1 (de) | 1974-03-28 |
Family
ID=5856372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2245182A Pending DE2245182A1 (de) | 1972-09-14 | 1972-09-14 | Monolithisch integrierter tonfrequenzoszillator fuer mehrfrequenzencode-wahl in fernmelde-, insbesondere fernsprechanlagen |
Country Status (11)
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS495373A (enrdf_load_stackoverflow) * | 1972-04-28 | 1974-01-18 |
-
1972
- 1972-09-14 DE DE2245182A patent/DE2245182A1/de active Pending
-
1973
- 1973-09-04 NL NL7312224A patent/NL7312224A/xx unknown
- 1973-09-11 ZA ZA737225*A patent/ZA737225B/xx unknown
- 1973-09-11 IT IT28770/73A patent/IT993192B/it active
- 1973-09-12 FR FR7332758A patent/FR2200711A1/fr not_active Withdrawn
- 1973-09-12 LU LU68408A patent/LU68408A1/xx unknown
- 1973-09-13 AU AU60303/73A patent/AU6030373A/en not_active Expired
- 1973-09-13 AR AR250085A patent/AR195943A1/es active
- 1973-09-13 BR BR7112/73A patent/BR7307112D0/pt unknown
- 1973-09-13 JP JP48103703A patent/JPS4969256A/ja active Pending
- 1973-09-14 BE BE135664A patent/BE804872A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AR195943A1 (es) | 1973-11-15 |
| AU6030373A (en) | 1975-03-13 |
| BE804872A (fr) | 1974-03-14 |
| IT993192B (it) | 1975-09-30 |
| FR2200711A1 (enrdf_load_stackoverflow) | 1974-04-19 |
| LU68408A1 (enrdf_load_stackoverflow) | 1973-11-22 |
| JPS4969256A (enrdf_load_stackoverflow) | 1974-07-04 |
| NL7312224A (enrdf_load_stackoverflow) | 1974-03-18 |
| BR7307112D0 (pt) | 1974-07-11 |
| ZA737225B (en) | 1974-08-28 |
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