US2555960A - Harmonic oscillation generating system - Google Patents

Harmonic oscillation generating system Download PDF

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Publication number
US2555960A
US2555960A US9363A US936348A US2555960A US 2555960 A US2555960 A US 2555960A US 9363 A US9363 A US 9363A US 936348 A US936348 A US 936348A US 2555960 A US2555960 A US 2555960A
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United States
Prior art keywords
grid
circuit
section
frequency
generating system
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Expired - Lifetime
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US9363A
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English (en)
Inventor
Jean L Delvaux
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General Electric Co
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General Electric Co
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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

  • H is Atto r'ney.
  • Circuits embodying my invention are particularly adapted to use a duplex electron discharge device of known triode-hexode type, or similar type.
  • a duplex electron discharge device of known triode-hexode type, or similar type.
  • Such a tube comprises within a common envelope a triode section and a multi-grid section which may be of the pentode, hexode, heptode, type etc., having at least two grid electrodes each capable of acting independently on the electron stream in the multi-grid section.
  • the triode section is commonly included in an oscillator circuit and the hexode section is included in a modulator and mixer circuit.
  • the control grid of the triode section is, in general, connected directly through a pressed on another control grid in a multi-grid section, which may hereafter conveniently be termed the signal grid.
  • means are provided for deriving from a triode oscillator circuit a harmonic voltage whose frequency is an integral multiple of the fundamental oscillator frequency. This harmonic frequency is then applied to the signal grid of the multi-grid section where it beats against the fundamental frequency supplied directly to the modulation grid. Finally, there may be selected in the output circuit of the multi-grid section one or more harmonic frequencies equal to the sum or difference frequency, and also the fundamental frequency if desired.
  • Fig. 1 is a circuit diagram of one form of oscillation generating system embodying the invention.
  • Figs. 2 and 3 are circuit diagrams of modified embodiments of the invention.
  • Fig. 1 there is represented a system employing a known form of duplex tube I0 having a left-hand triode section [0a and a right-hand hexode section lflb.
  • the electron streams in the two sections are electrically independent, and it will be understood that separate tubes might be utilized, although the construction illustrated is generally preferable for reasons of convenience, cost and physical size.
  • the triode section Illa comprises a cathode ll, control grid l2 and anode [3. These are connected in a suitable oscillation generating circuit. As represented, this circuit comprises a piezo-electric crystal element It connected between anode !3 and grid I2 and a resistor 15 connected between grid l2 and cathode Ii.
  • Anode operating potential is supplied from any suitable B+ source, represented conventionally by battery l6 through conductor ll, a resonant circuit l8 and a resistor [9.
  • the cathodes of both sections of device l0 are returned to the grounded negative terminal of the supply source 16 through a conventional resistance-capacitance network 20 which serves to provide an operating bias for certain electrodes of section [0b.
  • the crystal M maybe shunted by a capacitor 23, the resistor cuit I8 is tuned to an even. harmonic. fr,e.quency, which may be represented as, 21lf ,'[because the.
  • the multi-grid section illb of Zn comprises acathode 30, a plurality of grids 3 I-3,4 and an;
  • the circuits 39- and 40- may be tuned to; select the sum; and differences frequencies (2n+1)f and (Zn-1) respectively. These two frequencies may be supplied to suitable output circuits (not shown) by means of the. coils 4i and 42 coupled to the resonant circuits 39 and 40, respectively.
  • the amplitudes of the harmonic. frequencies supplied to the output; circuit may beadjusted by adjusting the impedanceof the. self-bias network 28. in a cathode return circuitof section b. It will of course beapparent. that-,the frequencies may also be stabilized in conventional manner by thermostatic control of the.- temper.- ature of crystal M, and if necessary by, thermostatic control of the other frequency-determine ing elements of the system.
  • Fig. 2 represents a. modified; embodimenthf the invention which-operates.insubstantially the same manner as that-of Fig, l'but which differs in that the tuned circuit I8, is connected; in shunt to the anode circuit of sectiomlila through a coupling capacitor 5t, instead.- of. being connested in series with the anodesuppl-y'circuit as in the case of Fig. 1.
  • An oscillation generating system comprising a. first electron. discharge path including an anode, cathode and control grid, means for impressing oscillations of fundamental frequency f on". said control. grid, a resonant Circuit connected between said anode and cathode tuned to a harmonic frequency 11, where n is an integer, a. second electron discharge path including'ananode, cathode and a plurality of grid electrodes, means comprising a direct connection fromsaid control grid to one of said' grid electrodes for impressing frequency f thereon, means-coupling said resonant circuit to another of said grid electrodes to impress frequency nf thereon, and.- an; output circuit connected between the; anode and:- cathode' of. said second device; tuned toselect acbeatfrequency from the group consisting of (n+1); and- (Yb-1H.
  • An oscillation generating system comprising, a first electron discharge path including an anode, cathode; and. control. grid, an oscillator circuit including said path and operating at. a fundamentahfrequency 7, a resonant. circuitconnested. between said anode and. cathode timed to. an even. harmonic frequency 2'nf, where 11 is aninteger, a second electron. discharge. path including an. anode, cathode. and, a plurality of grid electrodes, means comprising, a direct con,- nection from said control grid to. one of" said gridelectrodes for impressing frequency fthereonjrom said oscillator.
  • 2.1113 wheregn: 15.3.11 integer, meansfor. impressing; said. harmonic frequency on another.
  • grid of said multiegrid section, and an output; circuit; including: said multi-grid section and; comprising..a..tuned oil..- cuit. resonant:at..a.-beainfrequency;from thocsrolip consisting. of: (n+1). is and; (n'. ),;f:.
  • oscillationgenerating. system comprise ing a duplex. electron discharge device; having triode and-multiegrid sections withima common tube envelope, said: multi-grid. sectiorn including a...mcdulationz.gridi and a. signal grid a. direct connection between the gridofzsaidtrioide sec? tion, and. said; modulation grid,., an oscillator circuit; including. said triode: section and; oper..- ating to impress a, fundamental frcgaeney, f; on said; directlyrconnected grids, a.-resonant circuit excited by. said oscillator circuit and tuned to an even harmonic frequency 2-nf, Where. 1S1. an.

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  • Oscillators With Electromechanical Resonators (AREA)
US9363A 1945-10-16 1948-02-19 Harmonic oscillation generating system Expired - Lifetime US2555960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR918913T 1945-10-16

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FR (1) FR918913A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721264A (en) * 1948-06-11 1955-10-18 Cie Ind Des Telephones Device for obtaining multiple or submultiple frequencies of a given frequency
US2915708A (en) * 1955-08-15 1959-12-01 Motorola Inc Transistor oscillator with harmonically tuned output circuit
DE1491946B1 (de) * 1965-03-06 1971-02-11 Hattori & Co Ltd K Verfahren zur Erzeugung niederfrequenter Schwingungen aus einem Quarz sowie Anordnung zur Durchfuehrung des Verfahrens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559116A (en) * 1924-10-16 1925-10-27 Western Electric Co Wave generating and modulating system
US2191903A (en) * 1937-05-04 1940-02-27 Mo Valve Company Ltd Electron discharge device
US2241933A (en) * 1938-12-01 1941-05-13 Rca Corp Utilization of broadcast waves for obtaining high frequency carrier
GB544959A (en) * 1940-12-11 1942-05-05 Donald Cooke Improvements in or relating to generators of electrical oscillations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559116A (en) * 1924-10-16 1925-10-27 Western Electric Co Wave generating and modulating system
US2191903A (en) * 1937-05-04 1940-02-27 Mo Valve Company Ltd Electron discharge device
US2241933A (en) * 1938-12-01 1941-05-13 Rca Corp Utilization of broadcast waves for obtaining high frequency carrier
GB544959A (en) * 1940-12-11 1942-05-05 Donald Cooke Improvements in or relating to generators of electrical oscillations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721264A (en) * 1948-06-11 1955-10-18 Cie Ind Des Telephones Device for obtaining multiple or submultiple frequencies of a given frequency
US2915708A (en) * 1955-08-15 1959-12-01 Motorola Inc Transistor oscillator with harmonically tuned output circuit
DE1491946B1 (de) * 1965-03-06 1971-02-11 Hattori & Co Ltd K Verfahren zur Erzeugung niederfrequenter Schwingungen aus einem Quarz sowie Anordnung zur Durchfuehrung des Verfahrens

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Publication number Publication date
FR918913A (fr) 1947-02-21

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