SE320418B - - Google Patents
Info
- Publication number
- SE320418B SE320418B SE12495/65A SE1249565A SE320418B SE 320418 B SE320418 B SE 320418B SE 12495/65 A SE12495/65 A SE 12495/65A SE 1249565 A SE1249565 A SE 1249565A SE 320418 B SE320418 B SE 320418B
- Authority
- SE
- Sweden
- Prior art keywords
- bridges
- square
- signal
- temperature
- temperature change
- Prior art date
Links
- 239000013078 crystal Substances 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000007306 turnover Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1,079,056. Measuring temperature electrically. DECCA Ltd. Sept.13, 1965 [Sept. 28, 1964], No. 39449/64. Heading G1N. Frequency variations of a resonant circuit element such as an LC network, 40, Fig. 1, or a crystal represented thereby, which variations are proportional to the square of the temperature change from a datum value, are corrected by generating by means of bridges 14, 24 a signal the amplitude of which is proportional to the square of the temperature change, and by using this signal to control the value of a reactance 36 connected across the circuit element 40. The bridges may be Wheatstone bridges, or may each consist simply of a pair of resistors of different thermal coefficients series connected across an a.c. source 10. The bridges are balanced at the datum temperature, which would be the turnover temperature of the crystal, 40. The output of the first bridge 14 energizes the second bridge 24 via a transformer 20, to give a signal dependent upon the square of the temperature change, this being amplified at 30 and rectified at 32 to control the variable reactance 36, which may be a variable capacity diode. The square law relation may be modified by rectifying at 38 the signal from an extra secondary winding 22 on the transformer 20, and supplying this also to the variable reactance 36.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3944964A GB1079056A (en) | 1964-09-28 | 1964-09-28 | Improvements in or relating to regulating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE320418B true SE320418B (en) | 1970-02-09 |
Family
ID=10409602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE12495/65A SE320418B (en) | 1964-09-28 | 1965-09-27 |
Country Status (4)
| Country | Link |
|---|---|
| ES (1) | ES317849A1 (en) |
| GB (1) | GB1079056A (en) |
| NO (1) | NO117083B (en) |
| SE (1) | SE320418B (en) |
-
1964
- 1964-09-28 GB GB3944964A patent/GB1079056A/en not_active Expired
-
1965
- 1965-09-25 NO NO15984565A patent/NO117083B/no unknown
- 1965-09-27 SE SE12495/65A patent/SE320418B/xx unknown
- 1965-09-27 ES ES0317849A patent/ES317849A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1079056A (en) | 1967-08-09 |
| ES317849A1 (en) | 1966-03-16 |
| NO117083B (en) | 1969-06-30 |
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