GB570043A - Improvements in means for reducing surface leakage in high-impedance alternating current generators - Google Patents
Improvements in means for reducing surface leakage in high-impedance alternating current generatorsInfo
- Publication number
- GB570043A GB570043A GB429/43A GB42943A GB570043A GB 570043 A GB570043 A GB 570043A GB 429/43 A GB429/43 A GB 429/43A GB 42943 A GB42943 A GB 42943A GB 570043 A GB570043 A GB 570043A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- guard
- electrode
- leakage
- piezo
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
- H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only
Abstract
570,043. Piezo-electric crystals. BRUSH DEVELOPMENT CO. Jan. 8, 1943, No. 429. Convention date, Jan. 8, 1942. [Class 40 (v)] To reduce surface leakage between the electrodes of a piezo-electric signal generator, a guard electrode situated so as to intercept the leakage path is maintained at the same instantaneous potential as one of the electrodes. In Fig. 1 a piezo-electric generator 11 has electrodes 12, 13 and a guard ring electrode 21 intercepting the surface leakage path between electrodes 12, 13. Electrodes 12, 13 are connected to output terminals 14, 15 leakage between which is reduced by the provision of a second guard electrode 18 connected to guard electrode 21. The output terminals 14, 15 are connected as shown to the input of a high impedance amplifier in the form of a valve 17 arranged as a cathode follower and' the signal output is taken at 29, 30 across resistance 28. Guards 18 and 21 are connected to the cathode end of resistance 28 and are maintained at substantially the instantaneous potential of electrode 12. The leakage between the guard and the other electrode is supplied by the output of the amplifier 17 and does not form a load on the element 11. Modifications are described showing the provision of guard electrodes for series and parallel connected to plate elements connected to a single amplifier or to a push-pull pair. Specification 409,040 and U.S.A. Specifications 2,126,438, 2,207,539, 2,282,319 and 2,288,600 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US570043XA | 1942-01-08 | 1942-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB570043A true GB570043A (en) | 1945-06-20 |
Family
ID=22007901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB429/43A Expired GB570043A (en) | 1942-01-08 | 1943-01-08 | Improvements in means for reducing surface leakage in high-impedance alternating current generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB570043A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2660680A (en) * | 1950-08-09 | 1953-11-24 | Bell Telephone Labor Inc | Crystal temperature control means |
| US2940035A (en) * | 1955-02-14 | 1960-06-07 | Gulton Ind Inc | Electrical component of ceramic combined with resistor applied to the surface thereof |
| US5448127A (en) * | 1990-05-15 | 1995-09-05 | Canon Kabushiki Kaisha | Vibration wave driven motor |
-
1943
- 1943-01-08 GB GB429/43A patent/GB570043A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2660680A (en) * | 1950-08-09 | 1953-11-24 | Bell Telephone Labor Inc | Crystal temperature control means |
| US2940035A (en) * | 1955-02-14 | 1960-06-07 | Gulton Ind Inc | Electrical component of ceramic combined with resistor applied to the surface thereof |
| US5448127A (en) * | 1990-05-15 | 1995-09-05 | Canon Kabushiki Kaisha | Vibration wave driven motor |
| US5632074A (en) * | 1990-05-15 | 1997-05-27 | Canon Kabushiki Kaisha | Vibration wave driven motor |
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