DE583864C - Circuit for receiving modulated high-frequency waves - Google Patents

Circuit for receiving modulated high-frequency waves

Info

Publication number
DE583864C
DE583864C DET39009D DET0039009D DE583864C DE 583864 C DE583864 C DE 583864C DE T39009 D DET39009 D DE T39009D DE T0039009 D DET0039009 D DE T0039009D DE 583864 C DE583864 C DE 583864C
Authority
DE
Germany
Prior art keywords
circuit
tube
frequency waves
receiving modulated
rectifier
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
Application number
DET39009D
Other languages
German (de)
Inventor
Dr Hans-Otto Roosenstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DET38879D priority Critical patent/DE560227C/en
Priority to DET38969D priority patent/DE580991C/en
Application filed by Telefunken AG filed Critical Telefunken AG
Priority to DET39009D priority patent/DE583864C/en
Priority to FR730942D priority patent/FR730942A/en
Priority to DET40186D priority patent/DE618797C/en
Priority to US609421A priority patent/US2031072A/en
Priority to US615647A priority patent/US2014509A/en
Priority to GB15956/32A priority patent/GB393415A/en
Priority to GB17221/32A priority patent/GB393421A/en
Priority to FR43009D priority patent/FR43009E/en
Priority to GB3903/33A priority patent/GB413402A/en
Application granted granted Critical
Publication of DE583864C publication Critical patent/DE583864C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
    • H03D1/16—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of discharge tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
    • H04B14/004—Amplitude modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Rectifiers (AREA)
  • Hybrid Cells (AREA)
  • Noise Elimination (AREA)

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN AM
11. SEPTEMBER 1933ISSUED ON
SEPTEMBER 11, 1933

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

JVl 583864 KLASSE 21a4 GRUPPE 29JVl 583864 CLASS 21a 4 GROUP 29

T3900P VIIIaJ2iai Tag der Bekanntmachung über die Erteilung des Patents:T3900P VIIIaJ2ia i Date of the announcement of the grant of the patent: 19331933

Schaltung zum Empfang modulierter hochfrequenter WellenCircuit for receiving modulated high-frequency waves

Zusatz zum Patent 580991Addition to patent 580991

Patentiert im Deutschen Reiche vom 18. Juni 1931 ab Das Hauptpatent hat angefangen am 7. Juni 1931.Patented in the German Empire on June 18, 1931 The main patent started on June 7, 1931.

Im Patent 580 991 ist eine Gleichrichterschaltung beschrieben, die die Behebung der Fadings beim Empfang ermöglicht, indem Anwendung einer stetig wirkenden Gleichrichterstufe mit logarithmischer Gleichrichtkennlinie vorgesehen ist.In the patent 580 991 a rectifier circuit is described which the elimination of the Fadings during reception are made possible by using a continuously acting rectifier stage is provided with a logarithmic rectification characteristic.

Gemäß der vorliegenden Erfindung findet als Gleichrichterstufe die Kombination eines beliebigen Gleichrichters und eines entsprechend verzerrenden Verstärkers Anwendung. According to the present invention, the combination of a rectifier stage any rectifier and a correspondingly distorting amplifier application.

Es sei E die Feldstärke eines ankommenden unmodulierten Zeichens, und der durch die Gleichrichtung erhaltene Gleichstrom sei gegeben durch die Gleichrichtkennlinie, die der GleichungLet E be the field strength of an incoming unmodulated character, and let the direct current obtained by the rectification be given by the rectification characteristic, that of the equation

Jg = ψ (E)J g = ψ (E)

genügt. Die Kennlinie des Verstärkers für die gleichgerichteten Schwingungen sei weitergegeben durchenough. The characteristic of the amplifier for the rectified vibrations is passed on by

jv==f(Jt)=f(?pE),j v == f (J t ) = f ( ? p E),

wo /„ die verstärkte Stromstärke ist.where / "is the amplified amperage.

Es ist nun möglich, die Funktionen ψ und / so zu wählen, daß diese letzte Gleichung den Charakter annimmtIt is now possible to choose the functions ψ and / in such a way that this last equation takes on the character

Jg = log nat E -\- Konstanz. J g = log nat E - \ - constancy.

An sich ist diese Bedingung auf unendlich viele Arten zu erfüllen.In itself, this condition can be met in an infinite number of ways.

Als einfaches Beispiel sei der Fall dargestellt, daß die Gleichrichtkennlinie "eine lineare ist, während die Verstärkung einem logarithmischen Gesetz folgt:As a simple example, the case is shown that the rectification characteristic "a is linear, while the gain follows a logarithmic law:

JV=B log nat JS=B log nat E-\-B log nat A. J V = B log nat J S = B log nat E - \ - B log nat A.

Diese Lösung führt zu einer technisch einfachen Ausführung, deren Prinzip in der Abbildung dargestellt ist. Hierin ist 1 das Gleichrichtrohr, in dem die Gleichrichtung durch das bekannte Audionprinzip mittels des Blockkondensators 2 und des Widerstandes 3 über einen möglichst großen Bereich linear gemacht ist. Der mittlere Wert der Gitterspannung der Röhre 1 und infolgedessen auch der mittlere Wert des SpannungsabfallesThis solution leads to a technically simple design, the principle of which in the Figure is shown. Here 1 is the rectifier tube in which the rectification by the well-known audion principle by means of the blocking capacitor 2 and the resistor 3 is made linear over as large a range as possible. The mean value of the grid voltage of the tube 1 and consequently also the mean value of the voltage drop

*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:

Dr. Hans-Otto Roosenstein in Berlin.Dr. Hans-Otto Roosenstein in Berlin.

auf dem Widerstand 4 sind also lineare Funktionen der Feldstärke des ankommenden Zeichens. Der Kondensators dient als Kurzschluß für die Hochfrequenzwechselspannung. Die ganze gleichgerichtete Stromstärke, d. h. ihr Niederfrequenzanteil und ihr Gleichstromanteil zusammen, ist über den extrem hohen Widerstand 6 (z.B. 100 Megohm) an das Gitter der Verstärkerröhre 7 geto legt. Die Verstärkerröhre arbeitet im Gebiet negativer Gitterspannung, in dem bekanntlich für große Bereiche des Gitterstromes ig das Gesetz gilt:on the resistor 4 there are therefore linear functions of the field strength of the incoming character. The capacitor serves as a short circuit for the high-frequency AC voltage. The entire rectified current intensity, ie its low frequency component and its direct current component together, is passed to the grid of the amplifier tube 7 via the extremely high resistance 6 (eg 100 megohms). The amplifier tube works in the area of negative grid voltage, in which, as is well known, the law applies to large areas of the grid current i g:

ig=. A- eBv3 (1)i g =. A- e Bv 3 (1)

(e = Basis nat log System, vg = Gitterspannung, A und B sind Konstanten). Der Widerstand S habe einen so großen Wert R, daß er praktisch allein bestimmend für die Stromstärke ig ist. Weiter sei der Abzweig F so einreguliert, daß zwischen den Punkten E und F kein Gleichspannungsunterschied besteht, wenn kein Signal auf den Empfänger auftrifft. Ein Signal verursache eine Spannungserhöhung ν von E gegenüber F,. und der verursachte Gitterstrom berechnet sich nach dem Vorhergesagten angenähert zu (e = basis nat log system, v g = grid voltage, A and B are constants). The resistance S has such a large value R that it is practically the sole determinant of the current i g . Furthermore, the branch F is adjusted so that there is no DC voltage difference between points E and F when no signal is incident on the receiver. A signal causes a voltage increase ν of E compared to F ,. and the grid current caused is calculated according to the predicted approximately to

(2)(2)

(2) in (1) ergibt(2) in (1) results

log nat ν = B vs + log nat A R. log nat ν = B v s + log nat A R.

In Worten besagt diese Gleichung, daß die Gitterspannung der Verstärkerröhre die gewünschte logarithmische Funktion der gleichgerichteten Spannung und damit der ankommenden Hochfrequenzfeldstärke ist.In words this equation says that the grid voltage of the amplifier tube is the desired logarithmic function of the rectified voltage and thus the incoming High frequency field strength is.

Daß es für die Zwecke der Erfindung nicht notwendig ist, daß der Gleichrichter linear arbeitet, wurde oben schon erwähnt, beispielsweise kann man auch mit einem rein quadratisch arbeitenden Gleichrichter denselben Effekt erzielen, muß dann aber die Verstärkerwirkung nach dem GesetzeThat it is not necessary for the purposes of the invention that the rectifier is linear works, has already been mentioned above, for example you can also use a rectifier that works purely as a square To achieve an effect, however, the reinforcing effect must then according to the law

geschehen lassen. Dieses läßt sich beispielsweise durch die Kombination der Wirkung mehrerer Röhren erreichen.let it happen. This can be done, for example, by combining the effects multiple tubes.

Claims (3)

Patentansprüche:Patent claims: ι . Schaltung zum Empfang modulierter hochfrequenter Wellen mit einer stetig wirkenden Gleichrichterstufe von angenähert logarithmischer Gleichrichtkennlinie gemäß Patent 580 991, gekennzeichnet durch Verwendung eines beliebigen Gleichrichters in Kombination mit einem entsprechend verzerrenden Verstärker.ι. Circuit for receiving modulated of high-frequency waves with a steadily acting rectifier stage of approximated logarithmic rectification characteristic according to patent 580 991 by using any rectifier in combination with a correspondingly distorting amplifier. 2. Schaltung nach Anspruch 1, dadurch gekennzeichnet, daß das Gitter der verzerrenden Verstärkerröhre über einen im Vergleich zum Gitter-Kathoden-Widerstand hohen, vorzugsweise Ohmschen Widerstand mit dem der Kathode abgewandten Ende der Anodenimpedanz der Vorröhre verbunden ist.2. A circuit according to claim 1, characterized in that the grating of the distorting Amplifier tube has a high, preferably ohmic resistance compared to the grid-cathode resistance Resistance is connected to the end of the anode impedance of the pre-tube facing away from the cathode. 3. Schaltung nach Anspruch 1, dadurch gekennzeichnet, daß zur Anodenimpedanz der Vorröhre ein Hochfrequenznebenschluß vorgesehen, ist.3. A circuit according to claim 1, characterized in that the anode impedance a high frequency shunt is provided for the pre-tube. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DET39009D 1931-05-18 1931-06-17 Circuit for receiving modulated high-frequency waves Expired DE583864C (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DET38879D DE560227C (en) 1931-05-18 1931-05-18 Method for transmitting messages by means of high frequency waves
DET38969D DE580991C (en) 1931-05-18 1931-06-06 Circuit for receiving modulated high-frequency waves
DET39009D DE583864C (en) 1931-05-18 1931-06-17 Circuit for receiving modulated high-frequency waves
FR730942D FR730942A (en) 1931-05-18 1932-02-03 Method of communication by means of high frequency waves
DET40186D DE618797C (en) 1931-05-18 1932-02-08 Circuit for receiving modulated high-frequency waves
US609421A US2031072A (en) 1931-05-18 1932-05-05 Method of and means for signaling
US615647A US2014509A (en) 1931-05-18 1932-06-06 Radioreceiver
GB15956/32A GB393415A (en) 1931-05-18 1932-06-06 Improvements in or relating to receivers for modulated high frequency waves
GB17221/32A GB393421A (en) 1931-05-18 1932-06-17 Improvements in or relating to receivers for modulated high frequency waves
FR43009D FR43009E (en) 1931-05-18 1933-02-07 Method of communication by means of high frequency waves
GB3903/33A GB413402A (en) 1931-05-18 1933-02-08 Improvements in or relating to modulated carrier wave receivers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DET38879D DE560227C (en) 1931-05-18 1931-05-18 Method for transmitting messages by means of high frequency waves
DET38969D DE580991C (en) 1931-05-18 1931-06-06 Circuit for receiving modulated high-frequency waves
DET39009D DE583864C (en) 1931-05-18 1931-06-17 Circuit for receiving modulated high-frequency waves
DET40186D DE618797C (en) 1931-05-18 1932-02-08 Circuit for receiving modulated high-frequency waves

Publications (1)

Publication Number Publication Date
DE583864C true DE583864C (en) 1933-09-11

Family

ID=32034272

Family Applications (4)

Application Number Title Priority Date Filing Date
DET38879D Expired DE560227C (en) 1931-05-18 1931-05-18 Method for transmitting messages by means of high frequency waves
DET38969D Expired DE580991C (en) 1931-05-18 1931-06-06 Circuit for receiving modulated high-frequency waves
DET39009D Expired DE583864C (en) 1931-05-18 1931-06-17 Circuit for receiving modulated high-frequency waves
DET40186D Expired DE618797C (en) 1931-05-18 1932-02-08 Circuit for receiving modulated high-frequency waves

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DET38879D Expired DE560227C (en) 1931-05-18 1931-05-18 Method for transmitting messages by means of high frequency waves
DET38969D Expired DE580991C (en) 1931-05-18 1931-06-06 Circuit for receiving modulated high-frequency waves

Family Applications After (1)

Application Number Title Priority Date Filing Date
DET40186D Expired DE618797C (en) 1931-05-18 1932-02-08 Circuit for receiving modulated high-frequency waves

Country Status (4)

Country Link
US (2) US2031072A (en)
DE (4) DE560227C (en)
FR (2) FR730942A (en)
GB (3) GB393415A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758211C (en) * 1937-02-11 1953-02-09 Radio Transmission Equipment L Device for displaying the deviation of a vehicle from a course line
US2515187A (en) * 1942-04-09 1950-07-18 William R Bliss Wide dynamic range amplifying and demodulating system
US2577506A (en) * 1945-07-09 1951-12-04 Logan M Belleville Amplifier
US2662978A (en) * 1945-11-29 1953-12-15 Philco Corp Logarithmic transducer
US2548913A (en) * 1946-04-17 1951-04-17 Edmund D Schreiner Radio receiver with logarithmic response circuit
US2705794A (en) * 1946-06-11 1955-04-05 Philco Corp Signal modifying apparatus for eliminating variations as a function of one or more independent variables
US2663015A (en) * 1946-06-11 1953-12-15 Philco Corp Object location system employing logarithmic transducer
US2713162A (en) * 1950-12-14 1955-07-12 Rca Corp Pulse receiver with logarithmic amplifier and base clipping detector
US2823303A (en) * 1953-10-29 1958-02-11 Hoffman Electronics Corp Compressor circuits for panoramic receivers
DE962271C (en) * 1954-11-12 1957-04-18 Lorenz C Ag Circuit arrangement for frequency modulation
NL111923C (en) * 1956-04-11
GB933934A (en) * 1960-12-08 1963-08-14 Marconi Wireless Telegraph Co Improvements in or relating to frequency varying circuit arrangements

Also Published As

Publication number Publication date
US2031072A (en) 1936-02-18
DE618797C (en) 1935-09-17
FR43009E (en) 1934-01-25
GB393421A (en) 1933-06-08
US2014509A (en) 1935-09-17
DE580991C (en) 1933-07-19
GB393415A (en) 1933-06-08
GB413402A (en) 1934-07-19
FR730942A (en) 1932-08-26
DE560227C (en) 1932-09-29

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