DE616900C - - Google Patents
Info
- Publication number
- DE616900C DE616900C DENDAT616900D DE616900DA DE616900C DE 616900 C DE616900 C DE 616900C DE NDAT616900 D DENDAT616900 D DE NDAT616900D DE 616900D A DE616900D A DE 616900DA DE 616900 C DE616900 C DE 616900C
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- tube
- modulated
- unmodulated
- oscillations
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
- H03B19/06—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes
- H03B19/08—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device
- H03B19/10—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device using multiplication only
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM
26. FEBRUAR 1936ISSUED ON
FEBRUARY 26, 1936
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
M 616900 KLASSE 21a4 GRUPPE (3 M 616900 CLASS 21a 4 GROUP (3
P 64128 VIII aj2i o4 Tag der Bekanntmachung über die Erteilung des Patents: 11. Juli 1935 P 64128 VIII aj2i o 4 Date of the announcement of the grant of the patent: July 11, 1935
Telefunken Gesellschaft für drahtlose Telegraphie m. b. H. in Berlin*) Verfahren zur Frequenzverdopplung bzw. zur mehrfachen FrequenzverdopplungTelefunken Society for Wireless Telegraphy m. B. H. in Berlin *) Method for frequency doubling or for multiple frequency doubling
Patentiert im Deutschen Reiche vom 28. Oktober 1931 abPatented in the German Empire on October 28, 1931
Die Priorität der Anmeldung in Polen vom io. Juli 1931 ist in Anspruch genommen. The priority of registration in Poland from io. July 1931 is claimed.
Die Erfindung bezieht sich auf ein Verfahren zur Frequenzvervielfachung und
eignet sich insbesondere zur Frequenzvervielfachung modulierter Schwingungen.
Die Vorteile eines Einseitenbandmodulationsverfahrens für drahtlose Nachrichtenübermittlung
sind wohlbekannt. Man ist bei Einseitenbandtelephonieanordnungen zur Verwendung von Filterkreisen gezwungen, die
eine scharfe Aussiebung nur des einen Seitenbandes ermöglichen. Es läßt sich aber eine
wirksame Unterdrückung des einen Seitenbandes, während das andere Seitenband unbeeinflußt
bleiben soll, nur bei verhältnismäßig niedrigen Trägerfrequenzen ausführen, bei welchen der Abstand der Seitenbänder
voneinander gegen die Frequenz der Trägerwelle nicht allzu klein ist. Man bedient sich
daher häufig des Verfahrens, zunächst eine Trägerwelle niedriger Frequenz zu modulieren
und das eine Seitenband durch Filtermittel zu entfernen, welche in Anbetracht der
niedrigen Trägerfrequenz keine prozentual allzu große Trennschärfe zu besitzen brauchen,
und alsdann unter Verwendung von Röhrenanordnungen mit nicht linearer Charakteristik
Harmonische zu erzeugen. Dabei macht sich der Übelstand bemerkbar, daß Frequenzen der Seitenbänder Kombmationsfrequenzen
miteinander bilden, die nach entsprechender Vervielfachung unter Umständen störend im Übertragungsband auftreten.The invention relates to a method for frequency multiplication and is particularly suitable for frequency multiplication of modulated oscillations.
The advantages of a single sideband modulation scheme for wireless communications are well known. In the case of single sideband telephony arrangements, one is forced to use filter circuits which enable only one sideband to be screened out sharply. However, effective suppression of one sideband, while the other sideband should remain unaffected, can only be carried out at relatively low carrier frequencies at which the spacing of the sidebands from one another is not too small compared to the frequency of the carrier wave. The method is therefore often used to first modulate a carrier wave of low frequency and to remove the one sideband through filter means, which in view of the low carrier frequency do not need to have an excessively high degree of selectivity in terms of percentage, and then using tube arrangements with non-linear characteristics harmonics to create. The drawback is that frequencies of the sidebands form combination frequencies with one another which, after corresponding multiplication, may interfere with the transmission band.
Das Frequenzvervielfachungsverfahren gemäßig der Erfindung ist von Störungserscheinungen, die auf derartige Quermodulationen zurückzuführen sind, frei. Der Erfindung liegt das bekannte Frequenztransponierungsverfahren nach dem Heterodyne-Prinzip zugrunde, welches darin besteht, daß man durch Überlagerung zweier Frequenzen fs und f/, die Frequenzen fs-\-ff, und /s — fh erzeugen kann. Gemäß der Erfindung geht man derart vor, daß man aus der vorzugsweise modulierten steuernden Frequenz /s und der Hilfsfrequenz fh zunächst die Schwebungsfrequen- 7 en /s + /n und /s — fh erzeugt und die beiden Schwebungsfrequenzen ihrerseits nach dem Überlagerungsverfahren kombiniert, wobei die Summenfrequenz der beiden Schwebungsfrequenzen entsprechend der Gleichung fs ~fh + fs + fh = 2 F3 ergibt. Die so oihalLene doppelte Frequenz 2fs kann weiterhin nochmals mit der Frequenz fh oder auch, was zweckmäßig sein kann, mit einer Harmonischen derselben überlagert werden, so daß man auf diese Weise aus der Frequenz fs Oberwellen von der Frequenz 2" · /s erzeugen kann.The frequency multiplication method according to the invention is free from disturbance phenomena which can be attributed to such transverse modulations. The invention is based on the known frequency transposition method according to the heterodyne principle, which consists in that by superimposing two frequencies f s and f /, the frequencies f s - \ - ff and / s - f h can be generated. According to the invention one proceeds in such a way that one of the preferably modulated control the frequency / s and the auxiliary frequency f h initially Schwebungsfrequen- 7 s / s / n + and / s - f generated h and the two beat frequencies combined in turn by the overlay method , whereby the sum frequency of the two beat frequencies results in accordance with the equation f s ~ f h + f s + f h = 2 F 3. The double frequency 2f s thus obtained can also be superimposed again with the frequency f h or, what can be useful, with a harmonic of the same, so that in this way the frequency f s can be converted into harmonics of the frequency 2 "· / s can generate.
In Abb. ι ist die Erfindung schematisch näher dargestellt. Bei L werden die modu-In Fig. Ι the invention is shown schematically in more detail. At L the modular
*) Von dem Patentiucher ist als der Erfinder angegeben worden: * ) The patent seeker stated as the inventor:
Dipl.-Ing Josef v. Plebanski in Warschau.Dipl.-Ing Josef v. Plebanski in Warsaw.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL2025610X | 1931-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE616900C true DE616900C (en) |
Family
ID=19985887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT616900D Active DE616900C (en) | 1931-07-10 |
Country Status (2)
Country | Link |
---|---|
US (1) | US2025610A (en) |
DE (1) | DE616900C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1031417B (en) * | 1952-05-14 | 1958-06-04 | Ebauches Sa | Method for generating a voltage with a highly constant frequency |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL141629B (en) * | 1948-06-11 | Jobling & Co James A | VALVE. | |
US20110144545A1 (en) * | 2009-12-15 | 2011-06-16 | General Electric Company | Methods And System For Delivering Treatment To A Region Of Interest Using Ultrasound |
-
0
- DE DENDAT616900D patent/DE616900C/de active Active
-
1934
- 1934-09-12 US US743698A patent/US2025610A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1031417B (en) * | 1952-05-14 | 1958-06-04 | Ebauches Sa | Method for generating a voltage with a highly constant frequency |
Also Published As
Publication number | Publication date |
---|---|
US2025610A (en) | 1935-12-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE616900C (en) | ||
DE875219C (en) | Single sideband signal transmission system with suppressed carrier shaft and two control frequency sidebands as well as a receiving device to be used in this system | |
DE611807C (en) | Arrangement for phase modulating radio transmitters | |
DE2852718C2 (en) | Method for generating a wave with a line spectrum | |
DE1207455B (en) | Modulation circuitry | |
DE621204C (en) | Method for generating a frequency-modulated current | |
DE844309C (en) | Device for generating integer multiples of a basic frequency | |
DE958129C (en) | Modulation system | |
DE515691C (en) | Process for the simultaneous generation of several carrier frequencies | |
DE869225C (en) | Negative feedback circuit in high frequency stages, especially for single sideband transmitters | |
DE841158C (en) | Method for balancing the frequency deviation, especially in broadband circuits with frequency modulation | |
DE540337C (en) | Circuit for frequency conversion by means of a double grille | |
DE673784C (en) | Homodyne receiver | |
DE658906C (en) | Circuit for modulating a transmitter | |
DE560226C (en) | Arrangement for single sideband modulation | |
DE538922C (en) | Method for generating modulated, high-frequency oscillations in which a sideband or a sideband and the carrier shaft are suppressed | |
DE585809C (en) | Electron tube circuit | |
DE674975C (en) | Television synchronization process in which the synchronization characters are transmitted on the same wave as the image signals in the image scanning pauses | |
DE966536C (en) | Circuit for low-frequency modulation of a carrier oscillation | |
DE488791C (en) | Switching of high frequency amplifiers for sending and receiving purposes | |
AT141204B (en) | Method and device for receiving electrical waves by means of frequency changes. | |
DE662391C (en) | Arrangement for frequency multiplication or division | |
DE878073C (en) | Device for single sideband modulation | |
DE627207C (en) | Modulation circuit | |
DE726046C (en) | Procedure for the recovery of a previously suppressed sideband |