BE621743A - - Google Patents
Info
- Publication number
- BE621743A BE621743A BE621743DA BE621743A BE 621743 A BE621743 A BE 621743A BE 621743D A BE621743D A BE 621743DA BE 621743 A BE621743 A BE 621743A
- Authority
- BE
- Belgium
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
- H03H11/1208—Frequency selective two-port networks using amplifiers with feedback comprising an electromechanical resonator
-
- 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
- H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31047/61A GB973163A (en) | 1961-08-29 | 1961-08-29 | Improvements in or relating to crystal filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE621743A true BE621743A (da) |
Family
ID=10317164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE621743D BE621743A (da) | 1961-08-29 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3221265A (da) |
| BE (1) | BE621743A (da) |
| CH (1) | CH404819A (da) |
| DE (1) | DE1255827B (da) |
| GB (1) | GB973163A (da) |
| NL (1) | NL282567A (da) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177409A (ja) * | 1984-09-21 | 1986-04-21 | Sharp Corp | ノイズフイルタ |
| GB2433367B (en) * | 2005-12-03 | 2010-11-10 | Peter John Jones | Filter using tuning fork crystals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE709817C (de) * | 1936-11-20 | 1941-08-27 | Telefunken Gmbh | Kristallfilter veraenderbarer Bandbreite |
| GB509040A (en) * | 1937-10-06 | 1939-07-06 | James Robinson | Improvements in electrical frequency selective circuits |
| US2510868A (en) * | 1945-12-14 | 1950-06-06 | Press Wireless Inc | Wave transmission filter circuits |
| US2910657A (en) * | 1955-02-18 | 1959-10-27 | Gen Electric | Crystal filter |
-
0
- NL NL282567D patent/NL282567A/xx unknown
- BE BE621743D patent/BE621743A/xx unknown
-
1961
- 1961-08-29 GB GB31047/61A patent/GB973163A/en not_active Expired
-
1962
- 1962-08-16 US US217364A patent/US3221265A/en not_active Expired - Lifetime
- 1962-08-24 DE DEM54020A patent/DE1255827B/de active Pending
- 1962-08-29 CH CH1025562A patent/CH404819A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH404819A (fr) | 1965-12-31 |
| NL282567A (da) | |
| US3221265A (en) | 1965-11-30 |
| DE1255827B (de) | 1967-12-07 |
| GB973163A (en) | 1964-10-21 |