DE1696568U - DEVICE FOR THE CONVERSION OF LENGTH-MODULATED PULSES INTO AMPLITUDE-MODULATED PULSES. - Google Patents
DEVICE FOR THE CONVERSION OF LENGTH-MODULATED PULSES INTO AMPLITUDE-MODULATED PULSES.Info
- Publication number
- DE1696568U DE1696568U DEP5743U DEP0005743U DE1696568U DE 1696568 U DE1696568 U DE 1696568U DE P5743 U DEP5743 U DE P5743U DE P0005743 U DEP0005743 U DE P0005743U DE 1696568 U DE1696568 U DE 1696568U
- Authority
- DE
- Germany
- Prior art keywords
- modulated pulses
- pulses
- amplitude
- modulated
- length
- 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
- 238000006243 chemical reaction Methods 0.000 title 1
- 238000004804 winding Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
- H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses
Landscapes
- Particle Accelerators (AREA)
Description
ΡΑ-016933*11,7.55ΡΑ-016933 * 11.7.55
"P A T B 1 H. O L D"
Patentverwertungs- & Ilektro-Holding A.G., GrLARUS (Schweiz)" PATB 1 H. OLD"
Patentverwertungs- & Ilektro-Holding AG, GrLARUS (Switzerland)
Einrichtung zur Umwandlung von längenmodulierten Impulsen in amplitudenmodülierte Impulse»Device for converting length-modulated pulses into amplitude-modulated ones Impulses »
Zur Umwandlung von längönmodulierten Impulsen in amplitudenmodulierte Impulse ist die Anwendung des Integrationsprinzips bekannt. In einer besonders einfachen Einrichtung dieser Art wird beispielsweise während der Dauer eines Impulses ein Kondensator über einen ohmschen Widerstand aus einer Quelle konstanter Spannung aufgeladen und nach Beendigung des Impulses über eine Elektronenröhre rasch entladen* Die Spannung am Kondensator verläuft während der Impulsdauer nach einer Exponentialfunktion» Damit die Amplituden der amplitudenmodulierten Impulse wenigstens angenähert proportional sind zu den längen der längenmodulierten Impulse darf die maximale am Kondensator und an der £u diesen parallelgeschalteten Röhre auftretende Spannung nur einen kleinen Bruchteil der Speisespannung ausmachen, Dies bedingt die Verwendung relativ hoher Speise^annungen» '. The use of the integration principle is known for converting length-modulated pulses into amplitude-modulated pulses. In a particularly simple device of this type, for example, a capacitor is charged via an ohmic resistor from a source of constant voltage during the duration of a pulse and rapidly discharged via an electron tube after the pulse has ended the amplitudes of the amplitude-modulated pulses are at least approximately proportional to the lengths of the length-modulated pulses, the maximum voltage appearing on the capacitor and on the tube connected in parallel may only make up a small fraction of the supply voltage. This requires the use of relatively high supply approximations .
t 344 t 344
wenn die Spannung über der Bohre in einem für deren Betrieb vernünftigen'Intervall bleiben soll. Kur unter dieser Bedingung verläuft die Entladung des Kondensators nach Be- endigung eines Impulses so rasch, dass sie auch bei dichtwhen the voltage across the drill in one for its operation should remain reasonable 'interval. Treatment under this condition the discharge of the capacitor takes place so quickly after the end of a pulse that it remains even when it is tight
aufeinander folgenden Impulsen zu Beginn des nächsten Impulses beendigt ist.consecutive pulses at the beginning of the next pulse is finished.
Die Erfindung betrifft nun eine Einrichtung zur Umwandlung von längenmodulierten Impulsen in amplitudenmodulierte Impulse, welche auch bei niedriger Speisespannung einwandfrei arbeitet und deren Eigenschaften von der Röhrencharakteristik weitgehend unabhängig sind. Die Einrichtung ist dadurch gekennzeichnet, dass sich im Anodenkreis einer Elektronenröhre, an deren Steuergitter die längenmodulierten Impulse mit negativer Polarität angelegt sind, ein Schwingkreis befindet, deren Schwingungsperiode gröss ist gegenüber der Dauer der längsten umzuwandelnden Impulse.The invention now relates to a device for converting length-modulated pulses into amplitude-modulated ones Impulse that works perfectly even at low supply voltage and its properties depend on the tube characteristics are largely independent. The device is characterized in that there is one in the anode circuit Electron tube, to whose control grid the length-modulated pulses with negative polarity are applied, an oscillating circuit whose period of oscillation is greater than the duration of the longest impulses to be converted.
Die Ilg.l zeigt eine derartige Einrichtung.Ilg.l shows such a facility.
V ist die Elektronenröhre, L und C bilden den in ihrem Anodenkreis liegenden Schwingkreis» Die Einrichtung wird mit der Speisespannung XL betrieben. Die längen« modulierten Impulse U, werden dem Steuergitter der Röhre mit negativer Polarität und solcher Amplitude zugeführt, dass der Anodenstrom der Rohre während der Impulsdauer jeweils gesperrt ist, Der Unterbruch des Anodenstroms jeweils beim Impulsanfang stösst den Schwingkreis zu einer EigenschwingungV is the electron tube, L and C form the oscillating circuit in its anode circuit. »The device is operated with the supply voltage XL . The length modulated pulses U are fed to the control grid of the tube with negative polarity and such an amplitude that the anode current of the tubes is blocked for the duration of the pulse
' P 344'P 344
an, derart, dass das Potential U« der Anode sich in Abhängigkeit von der Zeit sinusförmig verändert (vergl. die gestrichelte Linie). Da erfindungsgemass die Eigenschwingungsperiode gross ist gegenüber der Dauer der längsten Impulse, wird schon nach relativ kurzer Zeit die Schwingung durch das 7/idereinsetzen des Anodenstromes am Impulsende abgebrochen. In dieser kurzen Zeit verläuft der Anstieg des Anodenpotentials sehr angenähert linear, sodass praktisch Proportionalität zwischen den Amplituden der Ausgangsirnpulse und den längen der Eingangsimpulse besteht·in such a way that the potential U «of the anode changes sinusoidally as a function of time (cf. the dashed line Line). Since, according to the invention, the natural oscillation period is large compared to the duration of the longest pulses, the oscillation is broken off after a relatively short period of time when the anode current begins to operate at the end of the pulse. In this short time, the increase in the anode potential is very approximately linear, so it is practical Proportionality between the amplitudes of the output pulse and the length of the input pulses
Die Erreichung des Ruhezustandes kann noch dadurch beschleunigt werden, dass gemass Fig.2 ein Gleichrichter G von beliebiger Bauart parallel zum Schwingkreis geschaltet wird. In einer erfindungsgemässen Einrichtung fliesst der ,Anodengleichstrom nur über den vernachlässigbar geringen Widerstand der Spüle L, Die Anodenspannung ist also gleich der Speisespannung} im Gegensatz zu den bekannten Integrieranordnungen ist hier also das Ruhepotential der Anode von der Röhrencharakteristik unabhängig.Reaching the state of rest can still be achieved be accelerated by the fact that according to Fig.2 a rectifier G of any type is connected in parallel to the resonant circuit. In a device according to the invention the anode direct current flows only over the negligible low resistance of the sink L, the anode voltage is thus equal to the supply voltage} In contrast to the known integrating arrangements, the rest potential is here the anode independent of the tube characteristics.
Die Entnahme der amplitudenmodulierten Impulse kann, wie in Fig.l angedeutet, an der Anode der Röhre er- r folgen. Es kann auch, wie die Pig,2 zeigt, eine Sekundärwicklung Ig mit der Spule L des Schwingkreises gekuppelt werden. Auf diese Weise lassen sich, im Gegensatz zu den bekannten Integrieranordnungen, sehr leicht auch Impulse - negativer Polarität gewinnen·The removal of the amplitude-modulated pulses, as indicated in Fig.l, at the anode of the tube r ER follow. As shown in Figure 2, a secondary winding Ig can also be coupled to the coil L of the resonant circuit. In this way, in contrast to the known integrating arrangements, it is also very easy to obtain impulses of negative polarity.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH315477T | 1953-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1696568U true DE1696568U (en) | 1955-04-14 |
Family
ID=4496010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP5743U Expired DE1696568U (en) | 1953-11-07 | 1953-11-19 | DEVICE FOR THE CONVERSION OF LENGTH-MODULATED PULSES INTO AMPLITUDE-MODULATED PULSES. |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH315477A (en) |
| DE (1) | DE1696568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1299318B (en) * | 1965-08-25 | 1969-07-17 | Evershed Vignoles Ltd | Method and circuit arrangement for converting pulse-amplitude-modulated signals into pulse-duration-modulated signals and vice versa |
-
1953
- 1953-11-07 CH CH315477D patent/CH315477A/en unknown
- 1953-11-19 DE DEP5743U patent/DE1696568U/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1299318B (en) * | 1965-08-25 | 1969-07-17 | Evershed Vignoles Ltd | Method and circuit arrangement for converting pulse-amplitude-modulated signals into pulse-duration-modulated signals and vice versa |
Also Published As
| Publication number | Publication date |
|---|---|
| CH315477A (en) | 1956-08-15 |
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