GB701627A - Improvements in or relating to electrical measuring apparatus - Google Patents
Improvements in or relating to electrical measuring apparatusInfo
- Publication number
- GB701627A GB701627A GB9306/52A GB930652A GB701627A GB 701627 A GB701627 A GB 701627A GB 9306/52 A GB9306/52 A GB 9306/52A GB 930652 A GB930652 A GB 930652A GB 701627 A GB701627 A GB 701627A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- output
- signal
- tube
- cavity
- 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
- 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
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
701,627. Automatic frequency control systems. SPERRY CORPORATION. April 10, 1952 [April 12, 1951; May 11, 1951], No. 9306/52. Class 38 (4). [Also in Group XXXVI] Apparatus for detecting the inflexion points of the response curve of a resonant circuit or cavity comprises a signal generator, means for modulating the frequency of the signal, feeding it to the cavity or circuit, detecting amplitude modulation in the response of the cavity or circuit and finding the frequencies at which distortion components are a minimum. In an automatic control arrangement'to maintain the frequency of a reflex Klystron oscillator 65 at the frequency f1 at which the inflexion point in the response curve of a translating device, such as a low-pass filter 50, 'is located. The output of the audio oscillator 12 produces a modulating signal of frequency fa which is applied through a transformer 46 to the repeller electrode so as to frequency modulate the signal produced by the tube 65. The output of the oscillator 12 is also connected to a frequency doubler 27 which provides a reference signal of frequency 2fa. The radio frequency signal produced at the output of the tube 65 is applied through an attenuator 48 to a low-pass filter 50, the output of which is applied through a demodulator 18 to an amplifier 20 tuned to the second harmonic of the signal produced by the audio oscillator 12. The outputs of the amplifier 20 and the frequency doubler 27 are applied to the inputs of a phase detector 54, the output of which is applied through a D.C. amplifier 52 across the resistor 44 and controls the voltage applied to the repeller electrode of the tube 65 so as to maintain the frequency of the signal produced by this tube at the frequency f1 at which the inflexion point of the response curve of the filter 50 is located. The filter 50 may be replaced by a resonant circuit such as a cavity resonator. Specification 609,298, [Group XXXVI], is referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1060858XA | 1951-04-12 | 1951-04-12 | |
| US701627XA | 1951-04-12 | 1951-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB701627A true GB701627A (en) | 1953-12-30 |
Family
ID=59627609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9306/52A Expired GB701627A (en) | 1951-04-12 | 1952-04-10 | Improvements in or relating to electrical measuring apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1060858A (en) |
| GB (1) | GB701627A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076199A (en) * | 2013-03-28 | 2014-10-01 | 艾默生网络能源系统北美公司 | Resonance frequency detecting method and device |
| CN110113858A (en) * | 2019-05-29 | 2019-08-09 | 中国科学院近代物理研究所 | A kind of minimum Q value self-excitation tuning system and tuning methods |
-
1952
- 1952-04-10 GB GB9306/52A patent/GB701627A/en not_active Expired
- 1952-04-11 FR FR1060858D patent/FR1060858A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076199A (en) * | 2013-03-28 | 2014-10-01 | 艾默生网络能源系统北美公司 | Resonance frequency detecting method and device |
| CN104076199B (en) * | 2013-03-28 | 2017-04-26 | 艾默生网络能源系统北美公司 | Resonance frequency detecting method and device |
| CN110113858A (en) * | 2019-05-29 | 2019-08-09 | 中国科学院近代物理研究所 | A kind of minimum Q value self-excitation tuning system and tuning methods |
| CN110113858B (en) * | 2019-05-29 | 2023-04-18 | 中国科学院近代物理研究所 | Minimum Q value self-excitation tuning system and tuning method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1060858A (en) | 1954-04-07 |
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