US2285372A - Push-pull mixing circuit for ultrashort waves - Google Patents

Push-pull mixing circuit for ultrashort waves Download PDF

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Publication number
US2285372A
US2285372A US384482A US38448241A US2285372A US 2285372 A US2285372 A US 2285372A US 384482 A US384482 A US 384482A US 38448241 A US38448241 A US 38448241A US 2285372 A US2285372 A US 2285372A
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Prior art keywords
push
circuit
oscillations
pull
frequency
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Expired - Lifetime
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US384482A
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English (en)
Inventor
Strutt Maximiliaan Julius Otto
Knol Kornelis Swier
Ziel Aldert Van Der
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/14—Balanced arrangements
    • H03D7/1416—Balanced arrangements with discharge tubes having more than two electrodes

Definitions

  • This invention relates to a push-pull mixing circuit for ultra-short waves and is particularly adapted for use in a superheterodyne receiver for decimeter waves.
  • the input impedance of a push-pull stage with otherwise unvaried conditions amounts to twice that of a single stage.
  • those parts of the electrode supply-conductors in which flows a high-frequency alternating current of the frequency to be amplified to be made materially shorter than in the case of a single stage so that the damping due to. the conductors is materially decreased.
  • the latter condition particularly occurs with the usefof two electrode systems arranged in one tube, or of two separate tubes whose bases are mirror images of one anotherso that they can be directly fastened together.
  • the invention has for its purpose to provide a push-pull mixing circuit of a simple and eflicient construction utilising only a single tube.
  • a tube having two electrode systems which are g each constituted by a triode and a diode having connection generating the local oscillations, whilst an impedance across which occur the local oscillations is provided between the two l cathodes, and an impedance across which occur the received oscillations is connected between the two diode. anodes, an oscillatory circuit tuned to the intermediate frequency being arranged intermediate the centres of the two said im pedances.
  • the circuit shown in the drawing comprises a tube [containing two electrode systems. These electrode systems are respectively constituted by a triode 2; 3, 4 and a diode 5, 4 having acommon having the frequency of the received oscillations or of the oscillator frequency occur in the output impedance so that the risk of troublesomeinterference sound is greatly decreased.
  • the first detector used in a superheterodyne receiver for ultracathode 4 and by a triode 6, I, 8 and a diode 9, 8 having a common cathode 8.
  • the two triodes in push-pull connection generate the localoscillations, for which purpose the control grids 3 and I are connected via grid condensers l0 and Il to a Lecher wire system l2, l3 which is tuned to the frequencyof the local oscillations with the aid of an earthed bridge 14 whilst an oscillatory circuit l5 tuned to the frequency of the formed by a Lecher-wire system 20, 2
  • An oscillatory circuit 23 is provided between the two diode anodes- 5 and 9, said oscillatory circuit being tuned to the frequency of the received oscillations and having its centre earthed.
  • the inductance of this oscillatory circuit is coupled to a coupling coil 24 which is connected to a di-pole aerial or to the output circuit of a highfrequency'amplifying stage so that the received oscillations are inductively transmitted to the circuit 23.
  • the bridge 22 is connected to earth via the series-connection of an oscillatory circuit 25 tuned to the intermediate frequency and a network 26 which is constituted by the parallel connection of a resistance and a condenser.
  • the circuit of the two diodes 4, 5 and 8, 9 consequently comprises an impedance 23 across which occur the received oscillations, and an impedance 20, 2
  • the current of the diodes includes a component
  • the intermediate-frequency circuit 25 may be A coupled to an intermediate-frequency amplifier in order to further amplify the generated intermediate-frequency oscillations.
  • a push-pull mixing circuit for ultra-short waves comprising a tube having two electrode systems each of which is constituted by a triode and a diode having a common cathode, circuits connecting the two triodes in push-pull for gen-' erating local oscillations, an impedance across which occur the local oscillations connected between the two cathodes, an impedance across which occur the received oscillations connected between the two diode anodes, and an oscillatory circuit tuned to the intermediate frequency resulting from the interaction of the local and received oscillations connected between the elec-' trical centers of said two impedances.
  • the impedance connected between the cathodes is constituted by a Lecher-wire system.
  • a push-pull mixing circuit for ultra-short waves comprising a tube having two electrode systems each of which is constituted by a triode and a diode having a common cathode, circuits connecting the two triodes in push-pull for gencrating local oscillations, a resonant circuit, uuned to the received oscillations and having its electrical center grounded, connected between the two diode anodes, a Lecher-wire system across which occur the local oscillationsconnected between the two cathodes, and the series-connection between thesliding bridge of the Lecherwire system and ground of an oscillatory circuit tuned to the intermediate frequency, resulting from the interaction of the local and received oscillations, and a network constituted by the parallel connection of a resistance and a condenser,
  • a push-pull mixing circuit for ultra-short waves comprising a tube having two electrode systems each of which is constituted by a triode and a diode having a common cathode, circuits connecting the two triodes in push-pull for generating local oscillations, said latter circuits comprising a resonant circuit tuned to the local oscillations connected between the anodes of the triodes and a Lecher-wire system connected to the grids of the triodes, a resonant circuit, tuned to the received oscillations and having its electrical center grounded, connected between the two diode anodes, a Lecher-Wire system across which occur the local oscillations connected between the twocathodes, and the series-connection between the sliding bridge of the latter "Lecherwire system and ground of an oscillatory circuit tuned to the intermediate frequency, re-
  • a modulator-oscillator circuit for ultrashort waves, the combination with a pair of electrode systems, each comprising at least a cathode, a control grid, an anode and a rectifier anode, an input circuit tuned to the received oscillations connected between the rectifier anodes, circuit means interconnecting the remaining electrodes in push-pull to produce locally generated oscillations, an impedance connecting the two cathodes across which are developed the locally generated oscillations, and a resonant circuit connected between the electrical centers of the input circuit and said cathode impedance,
  • said resonant circuit being tuned to the frequency resulting from the interaction of the 10- cal and received oscillations.
  • a modulator-oscillator circuit the combination with an electron discharge device containing a pair of electrode systems, each comprising at least a cathode, a control grid and an anode disposed in the order named and a rectifier anode next adjacent the cathode, an input circuit tuned to the received oscillations connected between the rectifier anodes, circuit means interconnecting the cathodes, control grids and anodes in push-pull to produce locally generated oscillations, an impedance connecting the two cathodes across which are developed the locally generated oscillations, and a resonant circuit connected between the electrical centers of the input circuit and said cathode impedance, said resonant circuit being tuned to the frequency resulting from the interaction of the local and received oscillations.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
US384482A 1940-05-30 1941-03-21 Push-pull mixing circuit for ultrashort waves Expired - Lifetime US2285372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL611701X 1940-05-30

Publications (1)

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US2285372A true US2285372A (en) 1942-06-02

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US384482A Expired - Lifetime US2285372A (en) 1940-05-30 1941-03-21 Push-pull mixing circuit for ultrashort waves

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US (1) US2285372A (en))
FR (1) FR872761A (en))
GB (1) GB611701A (en))
NL (1) NL58997C (en))

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434474A (en) * 1941-01-28 1948-01-13 Hartford Nat Bank & Trust Co Circuit arrangement for ultra short waves
US2441452A (en) * 1941-01-31 1948-05-11 Hartford Nat Bank & Trust Co Frequency changing circuits
US2453078A (en) * 1940-12-05 1948-11-02 Hartford Nat Bank & Trust Co Device for wave length transformation of very short waves
US2457008A (en) * 1944-12-21 1948-12-21 Rca Corp Frequency converter circuit
US2461306A (en) * 1943-05-31 1949-02-08 Rauland Corp Oscillator-amplifier radio circuits
US2469222A (en) * 1943-12-01 1949-05-03 Rca Corp Crystal rectifier converter
US2479537A (en) * 1942-12-30 1949-08-16 Gen Electric Detector-oscillator circuit for ultra high frequency receivers
US2505655A (en) * 1943-07-23 1950-04-25 Hartford Nat Bank & Trust Co Transmitting-receiving circuit arrangement for short waves
US2507995A (en) * 1947-11-12 1950-05-16 Avco Mfg Corp Television receiving system
US2508048A (en) * 1944-12-21 1950-05-16 Rca Corp Frequency converter circuits
US2516990A (en) * 1942-09-14 1950-08-01 Rca Corp Ultra high frequency mixer circuits
US2591983A (en) * 1943-11-12 1952-04-08 Hartford Nat Bank & Trust Co Mixing circuit arrangement
US2645710A (en) * 1948-03-12 1953-07-14 Hartz Julius Radio transmission and carrier wave modulation

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453078A (en) * 1940-12-05 1948-11-02 Hartford Nat Bank & Trust Co Device for wave length transformation of very short waves
US2434474A (en) * 1941-01-28 1948-01-13 Hartford Nat Bank & Trust Co Circuit arrangement for ultra short waves
US2441452A (en) * 1941-01-31 1948-05-11 Hartford Nat Bank & Trust Co Frequency changing circuits
US2516990A (en) * 1942-09-14 1950-08-01 Rca Corp Ultra high frequency mixer circuits
US2479537A (en) * 1942-12-30 1949-08-16 Gen Electric Detector-oscillator circuit for ultra high frequency receivers
US2461306A (en) * 1943-05-31 1949-02-08 Rauland Corp Oscillator-amplifier radio circuits
US2505655A (en) * 1943-07-23 1950-04-25 Hartford Nat Bank & Trust Co Transmitting-receiving circuit arrangement for short waves
US2591983A (en) * 1943-11-12 1952-04-08 Hartford Nat Bank & Trust Co Mixing circuit arrangement
US2469222A (en) * 1943-12-01 1949-05-03 Rca Corp Crystal rectifier converter
US2457008A (en) * 1944-12-21 1948-12-21 Rca Corp Frequency converter circuit
US2508048A (en) * 1944-12-21 1950-05-16 Rca Corp Frequency converter circuits
US2507995A (en) * 1947-11-12 1950-05-16 Avco Mfg Corp Television receiving system
US2645710A (en) * 1948-03-12 1953-07-14 Hartz Julius Radio transmission and carrier wave modulation

Also Published As

Publication number Publication date
GB611701A (en) 1948-11-02
NL58997C (en))
FR872761A (fr) 1942-06-18

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