DE669561C - Pendulum feedback receiver - Google Patents
Pendulum feedback receiverInfo
- Publication number
- DE669561C DE669561C DEM123599D DEM0123599D DE669561C DE 669561 C DE669561 C DE 669561C DE M123599 D DEM123599 D DE M123599D DE M0123599 D DEM0123599 D DE M0123599D DE 669561 C DE669561 C DE 669561C
- Authority
- DE
- Germany
- Prior art keywords
- pendulum
- receiving
- frequency
- circuit
- feedback receiver
- 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
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000002238 attenuated effect Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D11/00—Super-regenerative demodulator circuits
- H03D11/02—Super-regenerative demodulator circuits for amplitude-modulated oscillations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Electrotherapy Devices (AREA)
- Circuits Of Receivers In General (AREA)
Description
REICHRICH
ENTAMTENTAMT
Bei einem Pendelrückkopplungsempfänger wird bekanntlich die Rückkopplung für den Empfangsschwingungskreis im Takte einer Pendelfrequenz abwechselnd so geändert, daß für einen Augenblick Schwingungen entstehen und im nächsten Augenblick wieder abreißen, so daß man im Mittel eine sehr starke Entdämpfung des Empfangs sch wingungskreises erhält. Es ist bekannt, zur Erzeugung der Pendelfrequenzschwinig.ungien den Empfangsgleichrichter selbst auszunutzen uod die Rückkopplung des Empfangsgleichricihters im Takte der Pendelfrequenz zu ,ändern.When a pendulum feedback receiver is known, the feedback for the Receiving oscillating circuit in the cycle of a pendulum frequency alternately changed so that for a moment vibrations arise and in the next moment break off again, so that on average one has a very strong de-attenuation of the receiving sch wingungskreis receives. It is known to generate the pendulum frequency To use the receiving rectifier itself and the feedback of the receiving rectifier in the cycle of the pendulum frequency to change.
Bei Anwendung der Erfindung wird der Empfangsgleichrichter dagegen nicht von den Pendelfrequenzschwingungen und der Rückkopplung beeinflußt, so· daß die Gleichrichterbedingungen unabhängig gewähltwerdenkönnen. Nach der Erfindung wird ein Pendelfrequenzetnpfänger in der Weise ausgebildet, daß der am Gitter eines nicht rückgekoppelten Empfangsgleichrichters liegende Empfangsschwingungskreis mittels eines im Takte einer Pendelfrequenz wirksamen Dynatrons entdämpft wird. In dem Ausführungsbeispiel der Abbildung ist das Dynatron zusammen mit dem Pendelfrequenzschwingungskreis S A, 6 A als eine zugeschaltete Einheit aufzufassen, die den Empfängskreis 5, 6 periodisch stark entdämpft.When using the invention, on the other hand, the receiving rectifier is not influenced by the pendulum frequency oscillations and the feedback, so that the rectifier conditions can be selected independently. According to the invention, a pendulum frequency receiver is designed in such a way that the receiving oscillation circuit located on the grid of a receiving rectifier that is not fed back is undamped by means of a dynatron which is effective at a pendulum frequency. In the exemplary embodiment in the figure, the Dynatron, together with the pendulum frequency oscillation circuit S A, 6 A, is to be understood as a connected unit which periodically strongly undamped the receiving circuit 5, 6.
An Hand der Abbildung wird die Erfindung näher erklärt. Die Empfangsfrequenz wird dem Schwingungskreis 5, 6 zugeführt und gelangt über den Kondensator 2 zu der Detektorröhre 1, deren Gitter über den Widerstand 3 die Spannung der Batterie 4. zugeführt wird. Mit Hilfe der als Dynatron geschalteten Schirmgitterröhre 26 und des Schwingungskreises 5 A, 6 A wird eine Pendelfrequenz erzeugt. Das Schirmgitter erhält die größte positive Spannung der Batterie 25, während die Anode von dem Potentiometer 24 eine geringere Spannung erhält. Die Kathoden der beiden Röhren sind über die Leitung 27 miteinander verbunden.The invention is explained in more detail using the illustration. The reception frequency is fed to the oscillating circuit 5, 6 and arrives at the detector tube 1 via the capacitor 2, the grid of which the voltage of the battery 4 is fed via the resistor 3. With the help of the screen grid tube 26 connected as a Dynatron and the oscillating circuit 5 A, 6 A , a pendulum frequency is generated. The screen grid receives the greatest positive voltage from the battery 25, while the anode from the potentiometer 24 receives a lower voltage. The cathodes of the two tubes are connected to one another via line 27.
Der Schwingungskreis ζ A, 6 A enthält einen zweckmäßig verstellbaren Widerstand 28, der so gewählt oder eingestellt ist, daß das Verhältnis der Dämpfungen der beiden Kreise S, 6 und ζ A, 6A so· ist, daß die Schirmgitterröhre mit der Frequenz des Kreises 5 A, 6A schwingt und den Arbeitspunkt für die Empfangsfrequenz um einen der Knicke an den Enden des negativen Widerstandsteiles der bekannten Kennlinie eines Dynatrons hin und her verschiebt. Auf diese Weise wird der Arbeitspunkt für die Empfangsfrequenz, auf die der Kreis 5> 6 abgestimmt ist, im Takte der Pendelfrequenz abwechselnd auf Kennlinienteile mit negativerThe oscillating circuit ζ A, 6 A contains an expediently adjustable resistor 28, which is selected or set so that the ratio of the attenuation of the two circles S, 6 and ζ A, 6A is such that the screen grid tube with the frequency of circuit 5 A, 6A oscillates and shifts the operating point for the reception frequency to and fro around one of the kinks at the ends of the negative resistance part of the known characteristic of a dynatron. In this way, the operating point for the receiving frequency, to which the circle 5> 6 is tuned, is alternating in the cycle of the pendulum frequency with parts of the characteristic curve with negative ones
oder positiver Steilheit verschoben. Die Pendelfrequenz selbst reißt beim Aussteuern des Kennlinienteiles mit positiver Steilheit nicht ab, da die durchschnittliche Steilheit der von der Pendelschwingung ausgesteuerten Kennlinienteile negativ bleibt.or positive slope. The pendulum frequency itself breaks when modulating of the part of the characteristic curve with a positive slope does not decrease, since the average slope the parts of the characteristic curve controlled by the pendulum oscillation remain negative.
Der verstellbare Widerstand 28 ist
nicht erforderlich, aber insofern von
als er die Größe der Pendelfrequenzamplituden zu regeln gestattet.The adjustable resistor 28 is
not required, but to the extent of
than he allowed to regulate the size of the pendulum frequency amplitudes.
Da die Summe des Anodenstromes und des Schirmgitterstromes bei Änderung der Anodenspannung annähernd konstant bleibt und daher Änderungen des Anodenstromes von gleichen und entgegengesetzten Änderungen des Schirmgitterstromes begleitet werden, kann man die Telephone an die angekreuzten Stellen in den Schirmgitterkreis legen, man kann aber auch das Telephon direkt in den Anodenkreis der Schirmgitterröhre legen. Since the sum of the anode current and the screen grid current when the The anode voltage remains approximately constant and therefore changes in the anode current of equal and opposite changes the screen grid current can be accompanied by the telephones ticked off Place places in the screen grid circle, but you can also use the telephone Place directly in the anode circle of the screen grid tube.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11674/32A GB400268A (en) | 1932-04-22 | 1932-04-22 | Improvements in or relating to radio and other high frequency receivers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE669561C true DE669561C (en) | 1938-12-29 |
Family
ID=9990589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM123599D Expired DE669561C (en) | 1932-04-22 | 1933-04-20 | Pendulum feedback receiver |
Country Status (5)
Country | Link |
---|---|
US (1) | US2030120A (en) |
DE (1) | DE669561C (en) |
FR (1) | FR754045A (en) |
GB (1) | GB400268A (en) |
NL (1) | NL38703C (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2544741A (en) * | 1938-10-27 | 1951-03-13 | Arthur A Varela | Means for expanding a received pulse radio signal |
US2481852A (en) * | 1944-11-30 | 1949-09-13 | Hazeltine Research Inc | Superregenerative receiver |
BE469468A (en) * | 1945-03-01 | |||
BE458361A (en) * | 1945-03-15 | |||
NL65637C (en) * | 1945-12-08 | |||
NL154913B (en) * | 1950-07-19 | Hoegen Dijkhof Gmbh H J | CONNECTOR TO VEHICLE DEVICE FOR SPRAYING INSECTICIDES. | |
US20060264196A1 (en) * | 2005-05-19 | 2006-11-23 | Chun-Wah Fan | Super-regenerative receiver with damping resistor |
-
0
- FR FR754045D patent/FR754045A/fr not_active Expired
- NL NL38703D patent/NL38703C/xx active
-
1932
- 1932-04-22 GB GB11674/32A patent/GB400268A/en not_active Expired
-
1933
- 1933-04-19 US US666866A patent/US2030120A/en not_active Expired - Lifetime
- 1933-04-20 DE DEM123599D patent/DE669561C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR754045A (en) | 1933-10-27 |
GB400268A (en) | 1933-10-23 |
NL38703C (en) | |
US2030120A (en) | 1936-02-11 |
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