US2276879A - High frequency oscillator - Google Patents

High frequency oscillator Download PDF

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Publication number
US2276879A
US2276879A US303750A US30375039A US2276879A US 2276879 A US2276879 A US 2276879A US 303750 A US303750 A US 303750A US 30375039 A US30375039 A US 30375039A US 2276879 A US2276879 A US 2276879A
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US
United States
Prior art keywords
circuit
oscillator
load
points
loops
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 - Lifetime
Application number
US303750A
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English (en)
Inventor
Melvin A Rote
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.)
INTERNAT TELEPHONE DEV CO Inc
INTERNATIONAL TELEPHONE DEVELOPMENT Co Inc
Original Assignee
INTERNAT TELEPHONE DEV CO Inc
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 NL65055D priority Critical patent/NL65055C/xx
Priority to BE442302D priority patent/BE442302A/xx
Application filed by INTERNAT TELEPHONE DEV CO Inc filed Critical INTERNAT TELEPHONE DEV CO Inc
Priority to US303750A priority patent/US2276879A/en
Application granted granted Critical
Publication of US2276879A publication Critical patent/US2276879A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H03H7/383—Impedance-matching networks comprising distributed impedance elements together with lumped impedance elements
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/36—Networks for connecting several sources or loads, working on the same frequency band, to a common load or source

Definitions

  • An object of my invention is to provide an oscillator having a high degree of stability.
  • a further object of my invention is to provide a buffer circuit particularly adapted to high frequencies. With my invention an amplifier stage to isolate the oscillator from a load is no longer necessary.
  • Fig. l is a diagram of a self-controlled oscillater having in its output a re-entrant loop circuit
  • Fig. 2 is a modification of the circuit shown in Fig, 1.
  • a self-controlled oscillator designated I is connected to two loops 2 and 3 by means of a link coupling 4.
  • the loops 2 and 3 are of a type shown in the patent to Alford No. 2,147,809, and are particularly adaptable to a self-controlled oscillator for generating high frequency currents.
  • the oscillator may be any oscillator of a well known type having. all incidental or stray coupling between the grid and plate neutralized' so as to prevent any internal feedback in the oscillator itself.
  • the feedback circuit of the oscillator comprises a link 4 coupled to the tank or plate circuit 5, the path A and the leads 6 and coil 6a. coupled to the grid circuit 1.
  • Fig. 2 is a modification of the circuit shown in Fig. 1 and is more readily adapted to explaining the operation of the stabilizing circuit.
  • l2 represents the oscillator plate circuit and t3. the oscillator grid circuit.
  • feedback path comprises leads i4, path A, leads 6 and coil 6a.
  • the loops 2 and 3 are represented as square in form but bear no relationto the, physical shape of the loops themselves, that is,
  • the loops may be made of any desired shape and compensating means inserted to eliminate any disturbances that arise therefrom. Traveling waves entering the loops 2 and 3 by way of leads [4 will again produce voltage nodes at the points 9. The nodes are maintained at this point as long as the load I I and the grid coupling circuit 6 present equal impedances to the loops 2 and 3, and this condition is especially desirable since it is preferable to keep all energy possible out of the balancing circuit ID to prevent waste of energy in that circuit.
  • traveling wave will be sent along the loops 2 and 3, producing nodes at the points 9 and supplying energy to the load II and the grid coupling circuit 6. If, for some reason, the load varies in value from its value during the stable condition, there will be an alteration in the transmission of waves past the points a and a. In the case that part of the waves is transmitted backward toward the oscillator plate circuit and forward toward the balancing circuit, it will be seen that if the distances along the arms A, B and C, D are equal the reflected waves will produce nodes at the points b and b in a manner similar to the way that nodes are produced at the points 9, when the source of waves is the oscillator plate circuit.
  • conjugate networks that I have described have dealt particularly with natural lines designed for use with high frequencies. It is possible, however, to make the arms of these networks of impedances or artificial lines.
  • An oscillator comprising an output circuit, a conjugate bridge network comprising a reentrant loop circuit connected at one point to said output circuit, a balancing circuit connected to said network at a second point, means for connecting a load circuit to said network intermediate said points, and an input circuit for said oscillator connected to said network and electrically remote from said means.
  • An oscillator comprising an output circuit, a conjugate bridge network comprising a reentrant loop circuit connected at one point to said output circuit, a balancing circuit connected to said network at a second point, means for connecting a load circuit to said network intermediate said points, and an input circuit for said oscillator connected to said network intermediate said points and 180 electrically different in distance from said means.
  • An oscillator comprising an output circuit, a conjugate bridge network comprising a reentrant loop circuit connected at one point to said output circuit, a balancing circuit substantially equivalent electrically to said output circuit connected to said network at a second point substantially electrically different in distance from said first point, means for connecting a load circuit to said network intermediate said points and electrically equi-distant therefrom, and an input circuit for said oscillator connected to said network intermediate said points and electrically equi-distant therefrom and 180 electrically different in distance from said means.
  • An oscillator comprising an input circuit and an output circuit, a load circuit, a balancing circuit, a conjugate network comprising a transmission channel having its two ends joined to form a closed loop, connections between said load circuit and a first point of said loop, connections between said input circuit and. a second point of said loop whose electrical distances along the two halves of said loop to said first point differ by 180, connections from said output circuit and said balancing circuit, respectively, to symmetric intermediate points on said loop whereby said load circuit is conjugate to said input circuit.

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  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
US303750A 1939-11-10 1939-11-10 High frequency oscillator Expired - Lifetime US2276879A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL65055D NL65055C (xx) 1939-11-10
BE442302D BE442302A (xx) 1939-11-10
US303750A US2276879A (en) 1939-11-10 1939-11-10 High frequency oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US303750A US2276879A (en) 1939-11-10 1939-11-10 High frequency oscillator

Publications (1)

Publication Number Publication Date
US2276879A true US2276879A (en) 1942-03-17

Family

ID=23173523

Family Applications (1)

Application Number Title Priority Date Filing Date
US303750A Expired - Lifetime US2276879A (en) 1939-11-10 1939-11-10 High frequency oscillator

Country Status (3)

Country Link
US (1) US2276879A (xx)
BE (1) BE442302A (xx)
NL (1) NL65055C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479697A (en) * 1945-02-26 1949-08-23 Rca Corp Method of and means for frequency stabilizing signal generators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479697A (en) * 1945-02-26 1949-08-23 Rca Corp Method of and means for frequency stabilizing signal generators

Also Published As

Publication number Publication date
NL65055C (xx)
BE442302A (xx)

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