GB1221551A - Improvements in or relating to an electromechanical oscillator - Google Patents
Improvements in or relating to an electromechanical oscillatorInfo
- Publication number
- GB1221551A GB1221551A GB4482768A GB4482768A GB1221551A GB 1221551 A GB1221551 A GB 1221551A GB 4482768 A GB4482768 A GB 4482768A GB 4482768 A GB4482768 A GB 4482768A GB 1221551 A GB1221551 A GB 1221551A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- exciter
- output
- transistors
- electromechanical
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
- G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
- G01K5/58—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being constrained at more than one point, e.g. rod, plate, diaphragm
- G01K5/60—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being constrained at more than one point, e.g. rod, plate, diaphragm the body being a flexible wire or ribbon
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
1,221,551. Transistor oscillator circuits. CESKE VYSOKE UCENI TECHNICKE STAVEBNI USTAV. 20 Sept., 1968 [21 Sept., 1967], No. 44827/68. Heading H3T. [Also in Division G1] An electromechanical oscillator comprises an exciter and a mechanical oscillatory system having an electromechanical converter and a two-wire line connecting the converter in parallel with the exciter, with the exciter comprising at least one non-linear limiting circuit and at least one differentiating circuit, these being connected in cascade to form part of a closed feedback loop. In Fig. 2 the electromechanical converter 2, when oscillating, sends signals along line 3 to the preamplifier of transistors T2, T1 and to the Schmitt trigger of transistors T3, T4. The output can either be square wave or if required as a sine wave can be passed through transistor T7 and filter circuit 51-55. A feedback closed loop is completed via transistors T5, T6 of a differentiating circuit 12 having circuit values such that its output is synchronous with the output of 2. If the circuit is not self-starting, switch 4 when switched on, pulses line 3 to start the oscillations.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS672667 | 1967-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1221551A true GB1221551A (en) | 1971-02-03 |
Family
ID=5414956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4482768A Expired GB1221551A (en) | 1967-09-21 | 1968-09-20 | Improvements in or relating to an electromechanical oscillator |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH486685A (en) |
| DE (1) | DE1798269C3 (en) |
| FR (1) | FR1602115A (en) |
| GB (1) | GB1221551A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072763A (en) * | 2010-11-05 | 2011-05-25 | 邓铁六 | Unicoil steel string exciting and receiving circuit |
| WO2015195024A1 (en) * | 2014-06-18 | 2015-12-23 | Sondero Technologies Ab | Device for measuring vibration frequency |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118977A (en) * | 1976-10-13 | 1978-10-10 | The Foxboro Company | Electric signal transmitter for vibrating-wire sensor |
-
1968
- 1968-09-17 CH CH1386768A patent/CH486685A/en not_active IP Right Cessation
- 1968-09-19 DE DE19681798269 patent/DE1798269C3/en not_active Expired
- 1968-09-20 FR FR1602115D patent/FR1602115A/fr not_active Expired
- 1968-09-20 GB GB4482768A patent/GB1221551A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072763A (en) * | 2010-11-05 | 2011-05-25 | 邓铁六 | Unicoil steel string exciting and receiving circuit |
| WO2015195024A1 (en) * | 2014-06-18 | 2015-12-23 | Sondero Technologies Ab | Device for measuring vibration frequency |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1798269B2 (en) | 1975-01-23 |
| CH486685A (en) | 1970-02-28 |
| DE1798269A1 (en) | 1971-11-25 |
| DE1798269C3 (en) | 1975-08-28 |
| FR1602115A (en) | 1970-10-12 |
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