US2282714A - Method and means for the linear transmission or amplification of amplitude-modulatedcarrier waves - Google Patents

Method and means for the linear transmission or amplification of amplitude-modulatedcarrier waves Download PDF

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Publication number
US2282714A
US2282714A US307022A US30702239A US2282714A US 2282714 A US2282714 A US 2282714A US 307022 A US307022 A US 307022A US 30702239 A US30702239 A US 30702239A US 2282714 A US2282714 A US 2282714A
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amplitude
modulation
phase
potentials
potential
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US307022A
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English (en)
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Fagot Jacques
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Thales SA
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CSF Compagnie Generale de Telegraphie sans Fil SA
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/50—Amplitude modulation by converting angle modulation to amplitude modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
    • H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators

Definitions

  • the transmitter system of the present application has for its object to provide a modulated wave amplifying means and method applicable to radio-telephonic transmission.
  • the present invention involves on the one hand the system of modulation through phase shift, which is described in older patents (see especially United States Patents Nos. 1,882,119, 1,892,383, 1,946,308 and 2,009,080. See, also, Proceedings I. R. E., November, 1935, A Communication from H. Chireix).
  • the present invention involves on the other hand operation similar to that of an ordinary modulation system in which variation of the amplitude of the carrier wave is accomplished.
  • the present invention thus can in a certain.
  • One of the objects of the invention is to provide a method 'and means for high efiiciency operation for radio-telephonic transmitters.
  • 'Another object of the invention is to provide a method and means for amplification and trans-
  • the essential arrangement of the invention resides in feeding to the end or power tubes or to an intermediate amplifier stage of a transmitter connected along the lines of a modulation system predicated upon outphasing, amplitudemodulated potentials originating from a single input amplification chain or cascade, and in the use of reverse or negative feedback in the load circuit with a view to insuring modulation based upon amplitude variation only for the points of the modulation cycle which in the load circuit correspond to an instantaneous current value below the effective or root means square value of the'carrier wave, and modulation based both on amplitude variation and outphasing for points of the modulation cycle which correspond to larger load.
  • a transmit-' ter comprises only a last symmetric stage or preceding stages that are also symmetric to which the modulated potentials may be impressed either directly or else by the intermediary of auxiliary amplifiers.
  • the circuit organization moreover, includes compensating means whereby the distortingaction of the modulation cycle may be diminished, this means being'efiective especially when distortion is due to cuits.
  • Figure 1 illustrates a modulated wave amplifier system wherein two radio-frequency waves are fed to a common load in'phase-displaced relation to produce a resilient radio-frequency wave the amplitude of which depends on the phase relation which, in turn, is controlled by the signals.
  • Figure 2 illustrates a modulator and modulation amplifier arranged in accordance with the present invention.
  • I make use of modulation by phase shift and by carrier wave amplitude variation;
  • Figures 3 and 4 are voltage vectors used in illustrating the manner of operation of my system as illustrated in Fig. 2;
  • Figure 5 shows means for compensating nonlinearities occurring in the transmitter of Figure 2; while Figures 6 and 7 are modifications of thearrangement of Figure 2. r It is known in fact that the two modulation methods referred to hereinbefore differ essentially by the manner in which there is obtained the modulation of antenna currents under the action of the speech currents, this modulation producing in the two cases, amplitude variations of the carrier wave.
  • this amplitude variation of the carrier wave is obtained by applying to the antenna a high frequency potential, already modulated in amplitude by the potentials, which are substantially equal, form between each other a rather wide angle for instance).
  • a phase modulation in the reverse sense of these two elementary potentials, their relative phase shift varies, for example, 'between 120 and and this has the effect that the instantaneous current amplitude the saturation of the load .
  • the grids g1 g2 of the two tubes I and 2 are excited respectively by two potentials in and r us obtained from the same high-frequency oscillator 0 through two separate amplification chains C and C, these two potentials beingmodulated in modulators in mi and m'; by opposite phase variations.
  • the resultant current in the load is correspondingly modulated in amplitude.
  • the amplifying system forming the subject matter of the present invention is represented schematically in Figure 2. It differs from the preceding one by the mode of excitation of the grids g1 and g2 of. the tubes I and 2, the platecircuits of these tubes being the same and being controlled in the same manner.
  • the modulated alternating potentials applied to the grids g1 and ya in my system result from the composition of four elementary high frequency potentials U1, U2, Ua and Us, as will be explained hereinafter.
  • the potentials U1, U2 which are substantially equal to each other are applied respectively to each of the grids g1 ya but in opposite phasewith respect to each other,while the potential Us is applied substantially cophasally to the two grids with a phase in quadrature relative to the two preceding potentials V1 and V2.
  • Vs is likewise a high-frequency potential modulated in amplitude and the arrangement is such that this potential Us is also The poten-- tial Us can thus be considered as in inverse reaction.
  • the circuits will be controlled such that in the absence of modulation the angle a has a small value,.20, for instance.
  • the final stage thus behaves like a simple amplification stage modulated in amplitude and with inverse reaction.
  • Fig. 3 When assuming, for instance,'that Fig. 3. corresponds to a point of the modulation cycle such that the instantaneous power-of the transmitter be equal to the means power of the carrier wave, Fig. 4 will then correspond to the crest point of the same cycle.
  • the amplitude curve will under these conditions indicate a relative drop of 10% in the crest which value does not appear exaggerated.
  • this drop can be overcome in various ways.
  • this potential will, therefore, compensate in full or in part, its phase rotations.
  • a potential may be applied which tends itself to fall towards the crest in accordance with the same law.
  • this correction may further be eflfected by means of an auxiliary transmitter of very low power or simple amplifier G possessing the same distortion characteristic as the main transmitter Em.
  • Negative feedback is added to this auxiliary transmitter or to this amplifier serving as a compensator.
  • the efiective potential applied between grid and cathode will be equal to EeK Es wherein K is the coefficient of tlie inverse reaction.
  • This potential will contain aside from the fundamental term all the harmonics of the principal transmitter Em (since the distortions of these two transmitters are similar) but in phase opposition Q with respect to the fundamental term.
  • the phase of the small I transmitter could thus be made to lag to a lesser degree in order to be able to apply to the latter transmitter the inverse reaction.
  • the potential between grid and cathode of the input tube will thus have its phase which will advance with stage.
  • the potentials U1 U2 Ua and Ub obtained respectively from the chain C and from .the resistance Rs are then applied to the grids g'l and g: of the two tubes l and 2'.
  • circuits shown canbe provided or modified; without departing from the scope of the invention, in accordance with any known arrangement.
  • this stage also four tubes could be used which operate in pairs in syrmnetrical circuits or even a larger number could be utilized.
  • modifying the phase relatransmission is substantially linear, combining said transmitted components to produce a resultant, producing voltages representative or substantial departures or said resultant from linof said voltages to augment the resultant and to thereby maintain linearity over the entire modulation range during said relaying process.
  • a pair of electron discharge devices each having input and output electrodesfmeans for applying voltages from said source in phase opposition on the input electrodes of said tubes, means for applying voltage from said source in phase on the input electrodes 01' said tubes, a load connected with said output electrodes, and means for impressing voltages from said load on said input electrodes in phase opposition to said second earity, and reducing the phase displacement of a said components being transmitted'as a function named voltage impressed in phase on said input electrodes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Microwave Amplifiers (AREA)
US307022A 1938-12-02 1939-12-01 Method and means for the linear transmission or amplification of amplitude-modulatedcarrier waves Expired - Lifetime US2282714A (en)

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US2282714A true US2282714A (en) 1942-05-12

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US307022A Expired - Lifetime US2282714A (en) 1938-12-02 1939-12-01 Method and means for the linear transmission or amplification of amplitude-modulatedcarrier waves
US320532A Expired - Lifetime US2269518A (en) 1938-12-02 1940-02-24 Amplification

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US320532A Expired - Lifetime US2269518A (en) 1938-12-02 1940-02-24 Amplification

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CH (1) CH222396A (en(2012))
DE (1) DE759851C (en(2012))
FR (3) FR854015A (en(2012))
GB (1) GB537076A (en(2012))
NL (1) NL57174C (en(2012))

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658959A (en) * 1949-11-02 1953-11-10 Bell Telephone Labor Inc High efficiency radio-frequency power amplifier
US20050280466A1 (en) * 2004-06-21 2005-12-22 Gailus Paul H Method and apparatus for an enhanced efficiency power amplifier
US7184723B2 (en) 2004-10-22 2007-02-27 Parkervision, Inc. Systems and methods for vector power amplification
US20070247217A1 (en) * 2006-04-24 2007-10-25 Sorrells David F Systems and methods of rf power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7620129B2 (en) 2007-01-16 2009-11-17 Parkervision, Inc. RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals
US20100075623A1 (en) * 2007-06-19 2010-03-25 Parkervision, Inc. Systems and Methods of RF Power Transmission, Modulation, and Amplification, Including Embodiments for Controlling a Transimpedance Node
US7885682B2 (en) 2006-04-24 2011-02-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US8315336B2 (en) 2007-05-18 2012-11-20 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US8755454B2 (en) 2011-06-02 2014-06-17 Parkervision, Inc. Antenna control
US9106316B2 (en) 2005-10-24 2015-08-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification
US9608677B2 (en) 2005-10-24 2017-03-28 Parker Vision, Inc Systems and methods of RF power transmission, modulation, and amplification
US10278131B2 (en) 2013-09-17 2019-04-30 Parkervision, Inc. Method, apparatus and system for rendering an information bearing function of time

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Publication number Priority date Publication date Assignee Title
US2719190A (en) * 1950-10-27 1955-09-27 Bell Telephone Labor Inc High-efficiency translating circuit
BE524984A (en(2012)) * 1951-07-12
GB989329A (en) * 1964-01-16 1965-04-14 Standard Telephones Cables Ltd Electrical amplifying circuits
DE3906448C1 (en(2012)) * 1989-03-01 1990-03-15 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
US6334234B1 (en) * 1999-01-08 2002-01-01 Fantom Technologies Inc. Cleaner head for a vacuum cleaner
US7714649B1 (en) 2008-06-02 2010-05-11 Rockwell Collins, Inc. High-efficiency linear amplifier using non linear circuits
EP3205017B1 (en) 2014-10-07 2019-05-15 Telefonaktiebolaget LM Ericsson (publ) Driver circuit for composite power amplifier

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE341637A (en(2012)) * 1926-05-10
FR39312E (fr) * 1930-05-06 1931-10-12 Radio Electr Soc Fr Perfectionnements aux méthodes de radio-communication
DE598086C (de) * 1931-07-29 1934-06-05 Radio Electr Soc Fr Verfahren zur drahtlosen Nachrichtenuebermittlung mittels zweier aus einem Generator gespeister und in Differentialkopplung auf den Antennenkreis arbeitender Stromkreise
DE611876C (de) * 1934-02-04 1935-04-09 Radio Electr Soc Fr Hochfrequenzsendeanordung fuer modulierte Signale

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US2658959A (en) * 1949-11-02 1953-11-10 Bell Telephone Labor Inc High efficiency radio-frequency power amplifier
US20050280466A1 (en) * 2004-06-21 2005-12-22 Gailus Paul H Method and apparatus for an enhanced efficiency power amplifier
US7071775B2 (en) 2004-06-21 2006-07-04 Motorola, Inc. Method and apparatus for an enhanced efficiency power amplifier
US7945224B2 (en) 2004-10-22 2011-05-17 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including waveform distortion compensation embodiments
US20070116145A1 (en) * 2004-10-22 2007-05-24 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments
US9768733B2 (en) 2004-10-22 2017-09-19 Parker Vision, Inc. Multiple input single output device with vector signal and bias signal inputs
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
US8406711B2 (en) 2004-10-22 2013-03-26 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including a Cartesian-Polar-Cartesian-Polar (CPCP) embodiment
US8428527B2 (en) 2004-10-22 2013-04-23 Parkervision, Inc. RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
US8280321B2 (en) 2004-10-22 2012-10-02 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including Cartesian-Polar-Cartesian-Polar (CPCP) embodiments
US7421036B2 (en) 2004-10-22 2008-09-02 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments
US8233858B2 (en) 2004-10-22 2012-07-31 Parkervision, Inc. RF power transmission, modulation, and amplification embodiments, including control circuitry for controlling power amplifier output stages
US7466760B2 (en) 2004-10-22 2008-12-16 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments
US7526261B2 (en) 2004-10-22 2009-04-28 Parkervision, Inc. RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments
US9197163B2 (en) 2004-10-22 2015-11-24 Parkvision, Inc. Systems, and methods of RF power transmission, modulation, and amplification, including embodiments for output stage protection
US7639072B2 (en) 2004-10-22 2009-12-29 Parkervision, Inc. Controlling a power amplifier to transition among amplifier operational classes according to at least an output signal waveform trajectory
US7647030B2 (en) 2004-10-22 2010-01-12 Parkervision, Inc. Multiple input single output (MISO) amplifier with circuit branch output tracking
US7672650B2 (en) 2004-10-22 2010-03-02 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including multiple input single output (MISO) amplifier embodiments comprising harmonic control circuitry
US9197164B2 (en) 2004-10-22 2015-11-24 Parkervision, Inc. RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
US7835709B2 (en) 2004-10-22 2010-11-16 Parkervision, Inc. RF power transmission, modulation, and amplification using multiple input single output (MISO) amplifiers to process phase angle and magnitude information
US9166528B2 (en) 2004-10-22 2015-10-20 Parkervision, Inc. RF power transmission, modulation, and amplification embodiments
US8577313B2 (en) 2004-10-22 2013-11-05 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including output stage protection circuitry
US9143088B2 (en) 2004-10-22 2015-09-22 Parkervision, Inc. Control modules
US8433264B2 (en) 2004-10-22 2013-04-30 Parkervision, Inc. Multiple input single output (MISO) amplifier having multiple transistors whose output voltages substantially equal the amplifier output voltage
US7184723B2 (en) 2004-10-22 2007-02-27 Parkervision, Inc. Systems and methods for vector power amplification
US7932776B2 (en) 2004-10-22 2011-04-26 Parkervision, Inc. RF power transmission, modulation, and amplification embodiments
US8913974B2 (en) 2004-10-22 2014-12-16 Parkervision, Inc. RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
US8351870B2 (en) 2004-10-22 2013-01-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments
US8781418B2 (en) 2004-10-22 2014-07-15 Parkervision, Inc. Power amplification based on phase angle controlled reference signal and amplitude control signal
US8639196B2 (en) 2004-10-22 2014-01-28 Parkervision, Inc. Control modules
US8626093B2 (en) 2004-10-22 2014-01-07 Parkervision, Inc. RF power transmission, modulation, and amplification embodiments
US7844235B2 (en) 2004-10-22 2010-11-30 Parkervision, Inc. RF power transmission, modulation, and amplification, including harmonic control embodiments
US8447248B2 (en) 2004-10-22 2013-05-21 Parkervision, Inc. RF power transmission, modulation, and amplification, including power control of multiple input single output (MISO) amplifiers
US9094085B2 (en) 2005-10-24 2015-07-28 Parkervision, Inc. Control of MISO node
US9106316B2 (en) 2005-10-24 2015-08-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification
US9419692B2 (en) 2005-10-24 2016-08-16 Parkervision, Inc. Antenna control
US9608677B2 (en) 2005-10-24 2017-03-28 Parker Vision, Inc Systems and methods of RF power transmission, modulation, and amplification
US9614484B2 (en) 2005-10-24 2017-04-04 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including control functions to transition an output of a MISO device
US9705540B2 (en) 2005-10-24 2017-07-11 Parker Vision, Inc. Control of MISO node
US8050353B2 (en) 2006-04-24 2011-11-01 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US20070247217A1 (en) * 2006-04-24 2007-10-25 Sorrells David F Systems and methods of rf power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7355470B2 (en) 2006-04-24 2008-04-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US8059749B2 (en) 2006-04-24 2011-11-15 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US8036306B2 (en) 2006-04-24 2011-10-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification, including embodiments for compensating for waveform distortion
US7378902B2 (en) 2006-04-24 2008-05-27 Parkervision, Inc Systems and methods of RF power transmission, modulation, and amplification, including embodiments for gain and phase control
US7414469B2 (en) 2006-04-24 2008-08-19 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7423477B2 (en) 2006-04-24 2008-09-09 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7929989B2 (en) 2006-04-24 2011-04-19 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US8026764B2 (en) 2006-04-24 2011-09-27 Parkervision, Inc. Generation and amplification of substantially constant envelope signals, including switching an output among a plurality of nodes
US7937106B2 (en) 2006-04-24 2011-05-03 ParkerVision, Inc, Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US7750733B2 (en) 2006-04-24 2010-07-06 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for extending RF transmission bandwidth
US7885682B2 (en) 2006-04-24 2011-02-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US7949365B2 (en) 2006-04-24 2011-05-24 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US9106500B2 (en) 2006-04-24 2015-08-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for error correction
US8913691B2 (en) 2006-08-24 2014-12-16 Parkervision, Inc. Controlling output power of multiple-input single-output (MISO) device
US7620129B2 (en) 2007-01-16 2009-11-17 Parkervision, Inc. RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals
US8548093B2 (en) 2007-05-18 2013-10-01 Parkervision, Inc. Power amplification based on frequency control signal
US8315336B2 (en) 2007-05-18 2012-11-20 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8766717B2 (en) 2007-06-19 2014-07-01 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including varying weights of control signals
US20100075623A1 (en) * 2007-06-19 2010-03-25 Parkervision, Inc. Systems and Methods of RF Power Transmission, Modulation, and Amplification, Including Embodiments for Controlling a Transimpedance Node
US8013675B2 (en) 2007-06-19 2011-09-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
US8502600B2 (en) 2007-06-19 2013-08-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
US8461924B2 (en) 2007-06-19 2013-06-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for controlling a transimpedance node
US8410849B2 (en) 2007-06-19 2013-04-02 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8884694B2 (en) 2007-06-28 2014-11-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US8755454B2 (en) 2011-06-02 2014-06-17 Parkervision, Inc. Antenna control
US10278131B2 (en) 2013-09-17 2019-04-30 Parkervision, Inc. Method, apparatus and system for rendering an information bearing function of time

Also Published As

Publication number Publication date
FR856319A (fr) 1940-06-11
FR854015A (fr) 1940-04-03
FR50403E (fr) 1940-06-05
DE759851C (de) 1952-11-10
NL57174C (en(2012))
GB537076A (en) 1941-06-09
US2269518A (en) 1942-01-13
CH222396A (fr) 1942-07-15

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