GB662754A - Improvements in or relating to circuits for automatic frequency-correction - Google Patents
Improvements in or relating to circuits for automatic frequency-correctionInfo
- Publication number
- GB662754A GB662754A GB31235/48A GB3123548A GB662754A GB 662754 A GB662754 A GB 662754A GB 31235/48 A GB31235/48 A GB 31235/48A GB 3123548 A GB3123548 A GB 3123548A GB 662754 A GB662754 A GB 662754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fed
- klystron
- voltage
- output
- frequency
- 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
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000001939 inductive effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
- H03L7/04—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element wherein the frequency-determining element comprises distributed inductance and capacitance
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
662,754. Automatic frequency control systems. PHILIPS ELECTRICAL, Ltd. Dec. 2, 1948 [Dec. 5, 1947], No. 31235/48. Class 38 (iv). A reflex-klystron oscillator has its frequency automatically controlled by a voltage derived from a frequency discriminator, the control voltage being converted by modulation to a proportional A.C. voltage which is then rectified and fed to the reflector electrode or cathode of the oscillator, and the rectifier circuit is fed through an inductive or capacity coupling so as to isolate the modulator and discriminator from the high D.C. voltage of the klystron. As shown, a superheterodyne receiving circuit 1 ... 7 employs the klystron 2 as the local oscillator, and I.F. is fed from the amplifier 4 to a frequency discriminator 8, the output from which is fed to the grid of a modulating amplifier 10. A.C. is also fed to the grid' from a source 14 and the amplitudemodulated output is passed by a transformer 15 or a capacity coupling to a rectifier circuit 16 including an output filter 17, 18. The rectified output is connected across the reflector electrode 19 and the cathode of the klystron 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL662754X | 1947-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB662754A true GB662754A (en) | 1951-12-12 |
Family
ID=19798654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31235/48A Expired GB662754A (en) | 1947-12-05 | 1948-12-02 | Improvements in or relating to circuits for automatic frequency-correction |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB662754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1254200B (en) * | 1964-11-10 | 1967-11-16 | Standard Elek K Lorenz Ag | Synchrodyn receiver for high frequency electrical oscillations |
-
1948
- 1948-12-02 GB GB31235/48A patent/GB662754A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1254200B (en) * | 1964-11-10 | 1967-11-16 | Standard Elek K Lorenz Ag | Synchrodyn receiver for high frequency electrical oscillations |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB571627A (en) | Improvements in or relating to carrier current telephone transmitter circuits | |
| GB1057513A (en) | Improvements in or relating to low level signal amplifiers | |
| GB662754A (en) | Improvements in or relating to circuits for automatic frequency-correction | |
| US2223430A (en) | Modulation system | |
| GB662956A (en) | Improvements in or relating to pulse-modulation signalling systems | |
| GB675400A (en) | Improvements in amplitude-limiting circuits | |
| GB626595A (en) | Improvements in or relating to frequency modulation systems | |
| GB619156A (en) | Improvements relating to radio frequency modulators | |
| GB625268A (en) | Improvements in circuits for modulating the frequency or the phase of electrical oscillations | |
| GB579565A (en) | Improvements relating to demodulating apparatus for pulse signalling systems | |
| GB652122A (en) | Phase control apparatus especially for television synchronization | |
| US2697815A (en) | Angular modulation device | |
| GB663716A (en) | Improvements in or relating to circuits for demodulating modulated-pulse signals | |
| US3327246A (en) | Electrical signal modulator | |
| GB623181A (en) | Improvements in or relating to signal reproducing apparatus | |
| GB584596A (en) | An oscillator system for modulating the operating potential for an electric device | |
| GB608131A (en) | Super-regenerative receiver | |
| GB622099A (en) | Improvements in and relating to radio receiving apparatus | |
| GB692003A (en) | Improvements in or relating to frequency-stabilizing circuits for frequency-modulated oscillators | |
| GB636970A (en) | Frequency stabilising device for short wave and ultra-short wave generators | |
| GB546168A (en) | Improvements in frequency stabilising circuits for frequency modulation systems | |
| GB480548A (en) | Carrier wave signalling systems | |
| GB571840A (en) | Frequency modulation system | |
| GB627236A (en) | Improvements in or relating to thermionic valve circuits for teleraphy transmission and reception | |
| GB619968A (en) | Improvements relating to high frequency transmitting apparatus |