ZA791627B - A telephone band low-pass filter - Google Patents
A telephone band low-pass filterInfo
- Publication number
- ZA791627B ZA791627B ZA791627A ZA791627A ZA791627B ZA 791627 B ZA791627 B ZA 791627B ZA 791627 A ZA791627 A ZA 791627A ZA 791627 A ZA791627 A ZA 791627A ZA 791627 B ZA791627 B ZA 791627B
- Authority
- ZA
- South Africa
- Prior art keywords
- pass filter
- band low
- telephone band
- telephone
- low
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7810479A FR2422291A1 (en) | 1978-04-07 | 1978-04-07 | LOW PASS FILTER FOR TELEPHONE BAND |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA791627B true ZA791627B (en) | 1980-04-30 |
Family
ID=9206879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA791627A ZA791627B (en) | 1978-04-07 | 1979-04-05 | A telephone band low-pass filter |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS54134952A (en) |
| AU (1) | AU4584779A (en) |
| BE (1) | BE874754A (en) |
| DE (1) | DE2913135A1 (en) |
| EG (1) | EG14776A (en) |
| FI (1) | FI72018C (en) |
| FR (1) | FR2422291A1 (en) |
| GB (1) | GB2019146A (en) |
| IT (1) | IT1118544B (en) |
| LU (1) | LU81123A1 (en) |
| MX (1) | MX144741A (en) |
| NL (1) | NL7902568A (en) |
| PL (1) | PL214706A1 (en) |
| SE (1) | SE435121B (en) |
| ZA (1) | ZA791627B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2307626B (en) * | 1995-11-24 | 2000-06-07 | Nokia Mobile Phones Ltd | A signal receiver |
| DE10032530C2 (en) * | 2000-07-05 | 2002-10-24 | Infineon Technologies Ag | Amplifier circuit with offset compensation |
| US6552604B2 (en) * | 2001-02-16 | 2003-04-22 | The Boeing Company | Digitally tuned analog notch filter circuit |
| RU2677362C1 (en) * | 2018-03-14 | 2019-01-16 | федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) | Active rc filter |
| RU2722752C1 (en) * | 2019-12-11 | 2020-06-03 | федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) | Band-pass filter with independent adjustment of pole frequency, pole attenuation and transmission coefficient |
-
1978
- 1978-04-07 FR FR7810479A patent/FR2422291A1/en active Granted
-
1979
- 1979-03-12 BE BE1/9306A patent/BE874754A/en not_active IP Right Cessation
- 1979-03-19 GB GB7909533A patent/GB2019146A/en not_active Withdrawn
- 1979-03-28 JP JP3680979A patent/JPS54134952A/en active Pending
- 1979-03-28 EG EG79191A patent/EG14776A/en active
- 1979-04-02 FI FI791076A patent/FI72018C/en not_active IP Right Cessation
- 1979-04-02 NL NL7902568A patent/NL7902568A/en not_active Application Discontinuation
- 1979-04-02 DE DE19792913135 patent/DE2913135A1/en not_active Withdrawn
- 1979-04-03 IT IT67695/79A patent/IT1118544B/en active
- 1979-04-05 PL PL21470679A patent/PL214706A1/en unknown
- 1979-04-05 LU LU81123A patent/LU81123A1/en unknown
- 1979-04-05 AU AU45847/79A patent/AU4584779A/en not_active Abandoned
- 1979-04-05 ZA ZA791627A patent/ZA791627B/en unknown
- 1979-04-05 MX MX177213A patent/MX144741A/en unknown
- 1979-04-06 SE SE7903088A patent/SE435121B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2422291A1 (en) | 1979-11-02 |
| IT7967695A0 (en) | 1979-04-03 |
| IT1118544B (en) | 1986-03-03 |
| FI72018C (en) | 1987-03-09 |
| SE435121B (en) | 1984-09-03 |
| MX144741A (en) | 1981-11-18 |
| LU81123A1 (en) | 1979-11-07 |
| AU4584779A (en) | 1979-10-11 |
| BE874754A (en) | 1979-09-12 |
| NL7902568A (en) | 1979-10-09 |
| FI791076A (en) | 1979-10-08 |
| DE2913135A1 (en) | 1979-10-18 |
| FI72018B (en) | 1986-11-28 |
| PL214706A1 (en) | 1979-12-17 |
| SE7903088L (en) | 1979-10-08 |
| GB2019146A (en) | 1979-10-24 |
| JPS54134952A (en) | 1979-10-19 |
| EG14776A (en) | 1985-03-31 |
| FR2422291B1 (en) | 1982-03-19 |
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