US1848507A - Signors to telefonaktobolaget l - Google Patents

Signors to telefonaktobolaget l Download PDF

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Publication number
US1848507A
US1848507A US1848507DA US1848507A US 1848507 A US1848507 A US 1848507A US 1848507D A US1848507D A US 1848507DA US 1848507 A US1848507 A US 1848507A
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frequency
anode
circuit
frequencies
fundamental
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    • 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

Definitions

  • the present invention relates to a fI'B', quency converting electron valve relay for the generation of oscillations of desired frequency without disturbances by additional undesired oscillations.
  • the present invention has for its object to eliminate the said disadvantages.
  • the tuned oscillatory circuits or impedances included in the anode circuit are connected with the grid circuit by means of a feed back connection so devised as to retransfer, independently of the frequency, a constant fraction of the anode potential, substantially eliminating the reaction of the anode voltage upon the control voltages of the relay, with equal phase to w the two grids.
  • the characteristic of the two-valve relay retains its symmetrical parabolic form also in the dynamic state, i. e. when the relay is loaded.
  • Figure 2 is a circuit diagram of a modified embodiment.
  • Figure 3 is a characteristic diagram.
  • the relay is composed of two three-electrode tubes 1, 1' the anodes2,'2' of which are connected in parallel in relation to each other and connected to a common anode circuit composed of a number of oscillatory circuits.
  • the grids 3, 3 of the two tubes are'each connected to one terminal of the secondary coil 4 of a transformer, the primary winding 5 of which is supplied with the fundamental oscillation or oscillations to be converted.
  • the middle point of the secondary winding is connected to the filament circuit over a grid biasing battery 6.
  • V designates the anode alternating potential
  • V the control alternating voltage and a the amplification ratio of the tubes.
  • This resulting anode current is represented in the diagram, Figure 4, by the parabolic curve drawn in full lines. In most cases one may in the last equation neglect terms of higher order than the second for which reason the curve I may be practically considered asau exact parabola.
  • the anode current contains thus the fre- (lHGIlClQS 210 20);, (01 m ⁇ 111(1 (0 m
  • the anode-circuit includes a number of oscillatory circuits which are tuned each to one of said frequencies.
  • Said 0s *illatory circuits are in the shown embodiment mutually series connected and consist each of an inductance 7 and a capacity 8 connected in parallel.
  • the inductance 7 are inductively connected each to one compensating coil 9, which compensating coils are series connected in relation to each other and to the grid biasing battery 6.
  • Said compensating potential is inthe Formulas (3) and (4) represented by the term 8V
  • the factor 8 in this term is so adjusted by a suitable selection of the degree of coupling between the coils 7 and 9 ti at the reaction of the anode potential upon the control voltage is exactly compensated as above described.
  • the different anode circuit frequencies are tapped off from the appertaining tuned oscillatory circuits over the terminals 10.
  • the two fundamental frequencies m m: are obtained from mutually independent generators it may occur that a higher harmonic of the one fundamental oscillation in the grid circuit so interferes with the other fundamental oscillation that an interfering tone of low frequency is produced in the anode circuit.
  • the one fundamental frequency m is intended to have twice the value of the other one, the first of the higher harmonics of the latter fundamental frequency may on account of involuntary variations in the relation between the fundamental frequencies interfere with w; and thus cause a disturbing tone.
  • the two frequencies w +co and i m occurring in the anode circuit are also dependent on the variations in the frequencies oi and 0 supplied to the grids.
  • This inconvenience will be entirely eliminated by the embodiment shown in Figure 2.
  • This embodiment differs from the above described only therein that the secondary wind ing of the input transformer is divided into two halves 11, 11 and that a back coupling coil 12 and 12respeetively is included in series with each half. Said two back coupling coils are inductively coupled to one of the oscillatory circuits included in the anode cir cuit. The back coupling coils 12, 12 are over the grid biasing battery 6 both connected to the filament circuit.
  • the oscillatory circuit for 2c) is thus in this case connected to the grid circuit through a double back coupling, i. e. by means of a compensating coil 9 through which the two grids 3, 3 obtain compensating potentials of mutually equal phase sequence and of the frequency 2m and also by means of the two back coupling coils 12, 12 which transfer the frequency 20: to the two grids with mutually equal amplitudes but with opposite phases.
  • the grid circuit is supplied with the two oscillations w and 4a) generated in a separate generator and the two oscillations 3m and 5a) are retransferred from the anode circuit, oscillations of the frequencies 3 510, 7 w and 100) may be obtained in the anode circuit.
  • the retransfer coils 12, 12 are connected to the two oscillatory circuits which are tuned to the frequencies and
  • the circuit arrangement according to Figure 2 offers the advantage in comparison with the first described arrangement that in case of fluctuations in the fundamental frequency supplied from the outside all frequencies generated in the anode circuit will vary in exigher harmonics of the fundamental frequency, which may occur, will thus under all conditions either completely coincide with or considerably differ from the frequencies retransferred from the anode circuit to the grid circuit and will thus not cause disturbing tones.
  • one of the frequencies generated in the anode circuit may be tapped ofl:' therefrom and used as fundamental frequency in another static converter according to Figure 2 etc.
  • Two of the frequencies in the anode circuit may also be tapped off and together supplied to a converter according to Figure 1. In this manner a plurality of converters may be connected in cascade, arbitrary multiples of a given fundamental frequency being then obtainable.
  • the frequencies 30) and 4w are tapped off from the anode circuit in Figure 2 and supplied to the input side of a succeeding converter according to Figure 1 the frequencies 6m, 8m, 7m and w are obtained in the anode circuit of the latter. If again only the frequency 4w is tapped off and introduced on the 2. Any desired frequency'may be obtained in the anode circuit by a suitable selection of said fundamental frequencies.
  • Any desired frequency may be gener-. ated by the connection ofseveral converters in cascade. o a
  • the generated frequencies may be obtained practically free from higherhar monics.
  • 'A multiple generator according to the invention may be exactly dimensioned on the basis of an exact theoretical precalculation.
  • thecircuit arrangement accordin to the invention is especially suitable-to e applied, by way of example, in telephone systems in which high frequency oscillations are used as carrierwaves to transmit speech waves along telephone lines.
  • An entire line s sterm may then be fed with oscillations which are obtained from a single common fundamental frequency by means of static conversion.
  • Said fundamental frequency may be of a comparatively low frequency,ly1ng, by way of example, within the range of voice fre-- quencies and may then be converted to higher frequencies by connectingtwo or several frequency converting multiple generators in cascade according to the invention.
  • the compensation of the reaction of the anode -load upon the control voltages of the valve may also take place in other manner than by'the connection of the anode circuit to the grid circuit as above described.
  • said compensation may be brought about by the use of special electron valves, suchas shielded grid valves or pentode valves or the like, in which a shielding grid is disposed between the control grids and theanodes and said shielding grid is maintained at a constant potential.
  • a frequency converting electron valve relay comprising two grids, means for supplying fundamental oscillations with oppositephase to said grids,two anodes connected in parallel in a common anode circuit, a number-of impedances tuned to different frequencies and included in said anode circuit, and feed back connection adapted to retransfer, independently of the frequency, a constant fraction of the anode potential, substantially eliminatingthe reaction of the anode voltage upon the control voltages, with equal phase tothe two grids.
  • a frequency converting electron valve relay comprising two grlds, means for supplying fundamental oscillations with opposite phase to said grids, two anodes connected in parallel'in a common anode circuit, a number of impedances tuned to different frequencies and included in said anode circuit, and

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  • Ac-Ac Conversion (AREA)
  • Electron Tubes For Measurement (AREA)
  • General Induction Heating (AREA)
US1848507D 1928-10-08 Signors to telefonaktobolaget l Expired - Lifetime US1848507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE338263X 1928-10-08

Publications (1)

Publication Number Publication Date
US1848507A true US1848507A (en) 1932-03-08

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US1848507D Expired - Lifetime US1848507A (en) 1928-10-08 Signors to telefonaktobolaget l

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US (1) US1848507A (en))
BE (1) BE364226A (en))
DE (1) DE523192C (en))
FR (1) FR682181A (en))
GB (1) GB338263A (en))
NL (1) NL31447C (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445690A (en) * 1944-06-02 1948-07-20 Patt Elavathur Sub Viswanathan Electron oscillator
US2530614A (en) * 1943-10-21 1950-11-21 Hartford Nat Bank & Trust Co Transmitter and receiver for single-sideband signals
US2539826A (en) * 1945-07-30 1951-01-30 Thomas J George Electronic musical instrument
US2609509A (en) * 1945-06-13 1952-09-02 Bertram C Hill Electrical testing apparatus
US2865987A (en) * 1953-10-16 1958-12-23 Sautier & Jaeger Means for changing the frequency in combined wireless and television sets
US2913670A (en) * 1957-12-30 1959-11-17 Edwin F Laine Wide band regenerative frequency divider and multiplier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086300B (de) * 1958-12-17 1960-08-04 Siemens Ag Schaltungsanordnung zur Frequenzteilung und -vervielfachung
DE1168508B (de) * 1960-08-17 1964-04-23 Siemens Ag Schaltungsanordnung zur Frequenzteilung und -vervielfachung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530614A (en) * 1943-10-21 1950-11-21 Hartford Nat Bank & Trust Co Transmitter and receiver for single-sideband signals
US2445690A (en) * 1944-06-02 1948-07-20 Patt Elavathur Sub Viswanathan Electron oscillator
US2609509A (en) * 1945-06-13 1952-09-02 Bertram C Hill Electrical testing apparatus
US2539826A (en) * 1945-07-30 1951-01-30 Thomas J George Electronic musical instrument
US2865987A (en) * 1953-10-16 1958-12-23 Sautier & Jaeger Means for changing the frequency in combined wireless and television sets
US2913670A (en) * 1957-12-30 1959-11-17 Edwin F Laine Wide band regenerative frequency divider and multiplier

Also Published As

Publication number Publication date
FR682181A (fr) 1930-05-23
BE364226A (en))
GB338263A (en) 1930-11-20
NL31447C (en))
DE523192C (de) 1931-05-01

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