GB715158A - Low-loss tuned circuits employing reactance valves - Google Patents

Low-loss tuned circuits employing reactance valves

Info

Publication number
GB715158A
GB715158A GB965552A GB965552A GB715158A GB 715158 A GB715158 A GB 715158A GB 965552 A GB965552 A GB 965552A GB 965552 A GB965552 A GB 965552A GB 715158 A GB715158 A GB 715158A
Authority
GB
United Kingdom
Prior art keywords
valve
inductor
capacitors
resistor
circuit
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
Application number
GB965552A
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to GB965552A priority Critical patent/GB715158A/en
Publication of GB715158A publication Critical patent/GB715158A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/30—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Amplifiers (AREA)

Abstract

715,158. Valve amplifying circuits. NEALE, J. June 10, 1953 [April 17, 1952], No. 9655/52. Class 40 (6) In a low-loss high frequency tuned circuit, the inductive element is constituted by the effective inductance of a reactance valve. The circuit is particularly applicable to a receiver intended to receive a number of fixed frequency transmissions, either by switch tuning or tuning over a band. The coupling between amplifying stages V1, V3 comprises a tuned circuit in which valve V2 simulates an inductor tuned by capacitors C10, C11, C12 and C13. The anode of valve V2 is connected over an inductor L1 and blocking capacitor C4 to the grid which is returned to earth over resistor R5 and capacitors C5, C6. The reactance of the inductor L1 is arranged to be much greater than resistor R5 which in turn is much greater than that of capacitors C5, C6 in parallel. The capacitance of C5, C6 provides the phase shift, of the voltage applied to the grid in order than the valve V2 may operate as an inductor. Adjustment of the trimmer C6 varies the selectivity of the tuned circuit, and may be set to introduce a negative resistance component to reduce damping due to resistance effectively in parallel with the circuit. By choosing a resistor R5 having a similar temperature coefficient as that of the inductor L1, the variation of the effective inductance with temperature is minimized. Further compensation may be achieved by employing capacitors C5, C6 having equal and opposite coefficients to that of resistor R5. The power supplies for valve V2 are stabilized and a variable resistor R10 is arranged to give a small variation in impedance. A crystal X may be connected across the circuit. The capacitor C11 may be made continuously variable or varied in steps, the capacitors C5, C6 being changed if necessary.
GB965552A 1952-04-17 1952-04-17 Low-loss tuned circuits employing reactance valves Expired GB715158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB965552A GB715158A (en) 1952-04-17 1952-04-17 Low-loss tuned circuits employing reactance valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB965552A GB715158A (en) 1952-04-17 1952-04-17 Low-loss tuned circuits employing reactance valves

Publications (1)

Publication Number Publication Date
GB715158A true GB715158A (en) 1954-09-08

Family

ID=9876194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB965552A Expired GB715158A (en) 1952-04-17 1952-04-17 Low-loss tuned circuits employing reactance valves

Country Status (1)

Country Link
GB (1) GB715158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890333A (en) * 1955-08-19 1959-06-09 Bell Telephone Labor Inc Delay network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890333A (en) * 1955-08-19 1959-06-09 Bell Telephone Labor Inc Delay network

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