GB597430A - Improvements in two-terminal electric oscillatory circuits having adjustable dynamicresistance - Google Patents
Improvements in two-terminal electric oscillatory circuits having adjustable dynamicresistanceInfo
- Publication number
- GB597430A GB597430A GB2075245A GB2075245A GB597430A GB 597430 A GB597430 A GB 597430A GB 2075245 A GB2075245 A GB 2075245A GB 2075245 A GB2075245 A GB 2075245A GB 597430 A GB597430 A GB 597430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- resistance
- inductance
- dynamic resistance
- terminals
- 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
- 230000003534 oscillatory Effects 0.000 title 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 229910052904 quartz Inorganic materials 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 238000009966 trimming Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
597,430. Impedance networks. GENERAL ELECTRIC CO., Ltd., and BIGGS, A. J. Aug. 13, 1945, No. 20752. [Class 40 (iii)] [Also in Group XXXVI] A two-terminal antiresonant circuit presents an effective resistance at resonance ("dynamic resistance") which can be varied over a wide range and is approximately independent of frequency. The inductive element L, Fig. 2, and capacitive elements C1, C2 are bridged by a resistance R, which may have an inductance S in series with it to reduce the effect of changes of frequency. The condenser C2 is varied to vary the dynamic resistance across the terminals 1, 2, which is a maximum when the arms of the bridge are conjugate. Preferably, however, the tapping on the inductance L is replaced by an equivalent mutual inductance M, Fig. 8. A trimming condenser T is added to adjust the calibration, and stray capacity across the terminals 1, 2 may be taken into account. For measuring the dynamic resistance of quartz crystals and the like by the substitution method, the circuit may be used in combination with an oscillator, such as that described in Specification 597,439 whose output does not vary substantially with changes of frequency.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB597430A true GB597430A (en) | 1948-01-26 |
Family
ID=1735678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2075245A Expired GB597430A (en) | 1945-08-13 | Improvements in two-terminal electric oscillatory circuits having adjustable dynamicresistance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB597430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705000A1 (en) * | 1977-02-07 | 1978-08-10 | Kraftwerk Union Ag | Shaft vibration damper for turbo machine - comprises ring coupling components producing frictional torque to oppose torsion |
-
1945
- 1945-08-13 GB GB2075245A patent/GB597430A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705000A1 (en) * | 1977-02-07 | 1978-08-10 | Kraftwerk Union Ag | Shaft vibration damper for turbo machine - comprises ring coupling components producing frictional torque to oppose torsion |
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