SE325315B - - Google Patents
Info
- Publication number
- SE325315B SE325315B SE09454/64A SE945464A SE325315B SE 325315 B SE325315 B SE 325315B SE 09454/64 A SE09454/64 A SE 09454/64A SE 945464 A SE945464 A SE 945464A SE 325315 B SE325315 B SE 325315B
- Authority
- SE
- Sweden
- Prior art keywords
- piezo
- mechanical
- oscillations
- aug
- electric
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1,068,194. Semi-conductor devices; piezoelectric crystals. SIEMENS A.G. Aug. 19, 1964 [Aug. 20, 1963], No. 33814/64. Headings HIE and H1K. [Also in Divisions H3 and H4] An electromechanical transducer or mechanical amplifier comprises an elongated semiconductor crystal (1) which exhibits both piezo-electric and piezo-resistive effects. A mechanical oscillation is propagated in the crystal in the same direction as a chargecarrier drift produced by application of a D.C. potential between end electrodes (2, 3, Fig. 1). The mechanical oscillations are associated with piezo-electrically produced electrical oscillations which travel at approximately the same velocity as the charge carriers. The piezoresistive effect results in a further electric field which reinforces the original field. Suitable semi-conductors are the A III B V compounds, e.g. N-conductive GaSb or P-conductive GaAs. In the latter, the maximum piezo-electric effects are in the 111 direction. The apparatus may be pulse-operated, both the mechanical oscillations and the direct potential being applied in the form of simultaneous pulses.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0086811 | 1963-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE325315B true SE325315B (en) | 1970-06-29 |
Family
ID=7513292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE09454/64A SE325315B (en) | 1963-08-20 | 1964-08-04 |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE652068A (en) |
| CH (1) | CH422897A (en) |
| DE (1) | DE1441884A1 (en) |
| FR (1) | FR1397100A (en) |
| GB (1) | GB1068194A (en) |
| NL (1) | NL6407800A (en) |
| SE (1) | SE325315B (en) |
-
0
- BE BE652068D patent/BE652068A/xx unknown
-
1963
- 1963-08-20 DE DE19631441884 patent/DE1441884A1/en active Pending
-
1964
- 1964-05-20 CH CH657164A patent/CH422897A/en unknown
- 1964-06-04 FR FR977066A patent/FR1397100A/en not_active Expired
- 1964-07-09 NL NL6407800A patent/NL6407800A/xx unknown
- 1964-08-04 SE SE09454/64A patent/SE325315B/xx unknown
- 1964-08-19 GB GB33814/64A patent/GB1068194A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1441884A1 (en) | 1969-01-02 |
| BE652068A (en) | |
| GB1068194A (en) | 1967-05-10 |
| FR1397100A (en) | 1965-04-23 |
| NL6407800A (en) | 1965-02-22 |
| CH422897A (en) | 1966-10-31 |
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