JPS4944648A - - Google Patents
Info
- Publication number
- JPS4944648A JPS4944648A JP47087482A JP8748272A JPS4944648A JP S4944648 A JPS4944648 A JP S4944648A JP 47087482 A JP47087482 A JP 47087482A JP 8748272 A JP8748272 A JP 8748272A JP S4944648 A JPS4944648 A JP S4944648A
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Filters And Equalizers (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47087482A JPS4944648A (US20070167544A1-20070719-C00007.png) | 1972-08-31 | 1972-08-31 | |
| US05/390,703 US3939442A (en) | 1972-08-31 | 1973-08-23 | Ceramic filter circuit |
| DE2343505A DE2343505C2 (de) | 1972-08-31 | 1973-08-29 | Frequenzselektive Schaltungsanordnung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47087482A JPS4944648A (US20070167544A1-20070719-C00007.png) | 1972-08-31 | 1972-08-31 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8584977A Division JPS534445A (en) | 1977-07-18 | 1977-07-18 | Ceramic filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4944648A true JPS4944648A (US20070167544A1-20070719-C00007.png) | 1974-04-26 |
Family
ID=13916146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47087482A Pending JPS4944648A (US20070167544A1-20070719-C00007.png) | 1972-08-31 | 1972-08-31 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3939442A (US20070167544A1-20070719-C00007.png) |
| JP (1) | JPS4944648A (US20070167544A1-20070719-C00007.png) |
| DE (1) | DE2343505C2 (US20070167544A1-20070719-C00007.png) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243835U (US20070167544A1-20070719-C00007.png) * | 1975-09-23 | 1977-03-28 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614503Y2 (ja) * | 1989-09-08 | 1994-04-13 | 旭硝子株式会社 | 超音波遅延線の調整回路およびそれを内蔵した超音波遅延線素子 |
| US5216392A (en) * | 1991-07-05 | 1993-06-01 | Motorola, Inc. | Automatically controlled varactor tuned matching networks for a crystal filter |
| US7823509B2 (en) * | 2007-07-20 | 2010-11-02 | Frank J Dindl | Flechette cartridge |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686592A (en) * | 1970-10-08 | 1972-08-22 | Us Army | Monolithic coupled crystal resonator filter having cross impedance adjusting means |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2218087A (en) * | 1938-03-18 | 1940-10-15 | Telefunken Gmbh | Crystal filter of variable band width |
| US2373431A (en) * | 1943-03-30 | 1945-04-10 | Bell Telephone Labor Inc | Electric wave filter |
| US3633134A (en) * | 1969-10-10 | 1972-01-04 | Motorola Inc | Crystal band pass filter circuit |
| BE758421A (fr) * | 1969-11-06 | 1971-05-04 | Automatic Elect Lab | Filtre passe-bande a cristal polylithique, presentant des frequences polaires d'attenuation dans la bande d'arret inferieure |
| US3609601A (en) * | 1970-01-12 | 1971-09-28 | Collins Radio Co | Monolithic filter having "m" derived characteristics |
| US3716808A (en) * | 1971-05-20 | 1973-02-13 | Motorola Inc | Bandpass filter including monolithic crystal elements with resonating portions selected for symmetrical response |
-
1972
- 1972-08-31 JP JP47087482A patent/JPS4944648A/ja active Pending
-
1973
- 1973-08-23 US US05/390,703 patent/US3939442A/en not_active Expired - Lifetime
- 1973-08-29 DE DE2343505A patent/DE2343505C2/de not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686592A (en) * | 1970-10-08 | 1972-08-22 | Us Army | Monolithic coupled crystal resonator filter having cross impedance adjusting means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243835U (US20070167544A1-20070719-C00007.png) * | 1975-09-23 | 1977-03-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2343505A1 (de) | 1974-03-07 |
| US3939442A (en) | 1976-02-17 |
| DE2343505C2 (de) | 1982-03-25 |
