GB641890A - Improvements in and relating to automatic frequency control of radio-frequency oscillators - Google Patents
Improvements in and relating to automatic frequency control of radio-frequency oscillatorsInfo
- Publication number
- GB641890A GB641890A GB407047A GB407047A GB641890A GB 641890 A GB641890 A GB 641890A GB 407047 A GB407047 A GB 407047A GB 407047 A GB407047 A GB 407047A GB 641890 A GB641890 A GB 641890A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- tuning
- strut
- error
- grid
- 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
- 238000010438 heat treatment Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000003534 oscillatory 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
- Oscillators With Electromechanical Resonators (AREA)
Abstract
641,890. Automatic frequency control systems. MINISTER OF SUPPLY. Feb. 12, 1947, No. 4070. [Class 38 (iv)] [Also in Group XL (c)] A system of the kind set forth in Specification. 641,899 wherein the frequency of a thermallytuned oscillator is controlled in dependence on the tuning error by heating current operative on a tuning-strut and the value of which depends on the error, is characterized by an arrangement wherein a differentiated feed-back operates on the trigger circuit so that the rate of change of frequency is proportional to the tuning error and independent of the exponential heating effects of the tuning-strut. The output at 33 from the trigger valve 19 is applied to the grid of a valve 34 which has a timeconstant circuit CR2 connected between anode and grid with the result that the anode voltage rises exponentially. By choice of C and R2 this rise is made to simulate the rise in temperature of the tuning-strut. The anode voltage thus represents the actual oscillatory frequency. This is differentiated by the elements 37, 38 and a voltage representing the rate of frequency change is amplified at 36, 39 and fed back as an additional input to the trigger valve 19. Specification 641,891 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB407047A GB641890A (en) | 1947-02-12 | 1947-02-12 | Improvements in and relating to automatic frequency control of radio-frequency oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB407047A GB641890A (en) | 1947-02-12 | 1947-02-12 | Improvements in and relating to automatic frequency control of radio-frequency oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB641890A true GB641890A (en) | 1950-08-23 |
Family
ID=9770164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB407047A Expired GB641890A (en) | 1947-02-12 | 1947-02-12 | Improvements in and relating to automatic frequency control of radio-frequency oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB641890A (en) |
-
1947
- 1947-02-12 GB GB407047A patent/GB641890A/en not_active Expired
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