CA1072694A - Circuit de commande electronique de sonnerie a tonalite pour appareil telephonique - Google Patents
Circuit de commande electronique de sonnerie a tonalite pour appareil telephoniqueInfo
- Publication number
- CA1072694A CA1072694A CA288,023A CA288023A CA1072694A CA 1072694 A CA1072694 A CA 1072694A CA 288023 A CA288023 A CA 288023A CA 1072694 A CA1072694 A CA 1072694A
- Authority
- CA
- Canada
- Prior art keywords
- transistor
- circuit
- capacitor
- voltage
- supply voltage
- 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.)
- Expired
Links
- 230000001052 transient effect Effects 0.000 claims abstract description 14
- 230000001629 suppression Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 241000272470 Circus Species 0.000 description 1
- 101150087426 Gnal gene Proteins 0.000 description 1
- VREFGVBLTWBCJP-UHFFFAOYSA-N alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA288,023A CA1072694A (fr) | 1977-10-03 | 1977-10-03 | Circuit de commande electronique de sonnerie a tonalite pour appareil telephonique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA288,023A CA1072694A (fr) | 1977-10-03 | 1977-10-03 | Circuit de commande electronique de sonnerie a tonalite pour appareil telephonique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072694A true CA1072694A (fr) | 1980-02-26 |
Family
ID=4109694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA288,023A Expired CA1072694A (fr) | 1977-10-03 | 1977-10-03 | Circuit de commande electronique de sonnerie a tonalite pour appareil telephonique |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1072694A (fr) |
-
1977
- 1977-10-03 CA CA288,023A patent/CA1072694A/fr not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |