US2335050A - Electron discharge amplifier - Google Patents

Electron discharge amplifier Download PDF

Info

Publication number
US2335050A
US2335050A US447939A US44793942A US2335050A US 2335050 A US2335050 A US 2335050A US 447939 A US447939 A US 447939A US 44793942 A US44793942 A US 44793942A US 2335050 A US2335050 A US 2335050A
Authority
US
United States
Prior art keywords
cathode
inductance
anode
discharge device
electron discharge
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
US447939A
Other languages
English (en)
Inventor
George W Fyler
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.)
General Electric Co
Original Assignee
General Electric Co
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 BE474424D priority Critical patent/BE474424A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US447939A priority patent/US2335050A/en
Priority to GB9808/43A priority patent/GB564243A/en
Application granted granted Critical
Publication of US2335050A publication Critical patent/US2335050A/en
Priority to FR938658D priority patent/FR938658A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements

Definitions

  • My invention relates to electron discharge amplifiers and particularly to such amplifiers operating at frequencies at which difiiculties are encountered due to low input resistance of the discharge device.
  • An object of my invention is to reduce the degeneration produced by oscillatory currents of the output circuit of the amplifier flowing in this common lead to the cathode.
  • a further object of my invention is to provide means to maintain the cathode of an electron discharge device operating at such frequencies at ground potential.
  • Another object of my invention is to provide means to produce neutralization of the voltage on this cathode lead.
  • FIG. 1 of the drawing I have shown therein an amplifier I having a cathode 2, a control electrode 3, a screen electrode 4, asuppressor electrode 5 and an anode 6. Between the control electrode 3 and cathode 2 is connected a tuned circuit 1, which I have indicated as being coupled to a receiving antenna 8, although, of course, any desired means may be employed for exciting in this circuit 1 oscillatory electromotive forces to be amplified by amplifier I. These oscillatory electromotive forces are amplified by the discharge device I and may be supplied through a coupling condenser 9 to the control grid of a subsequent amplifier I0, if desired.
  • the anode 6 of the discharge device is supplied with operating potential from a source of anode voltage the positive terminal of which is indicated at H and the negative terminal 01 which may be grounded as at l2.
  • This circuit may include a suitable resistance l3, high frequency choke coil l4 and tuning inductance IS.
  • the inductance l5 may be proportioned to resonate with such capacity as exists between the anode and cathode of the discharge device I plus the capacity across the tending within the discharge device.
  • discharge device !0 This latter capacity is indicated in dotted lines at IS.
  • the cathode of the discharge device I is connected to ground through a lead conductor having unavoidable inductance, although this conductor may be made as short' as conditions of practice permit.
  • This inductance is represented at I! and I8.
  • a substantial portion of this inductance may be that comprised by the lead ex- Oscillatory electromotive force produced on these inductances I1 and I8 exists between the control electrode 3 and cathode 2 and hence reduces the resistance of the discharge device for reasons that are well understood in the art.
  • FIG. 2 This character of the circuit is better portrayed in Fig. 2 in which the reference characters employed' in Fig. 1 are applied to corresponding elements.
  • the inductance I is shown as having one terminal connected to the anode of the discharge device I and its lower terminal connected to the point on the cathode lead between inductances I1 and I8.
  • the input capacitance of discharge device II) is indicated at I6 and the total capacitance between the anode and cathode of the discharge device I is indicated at 2I. Since inductance I5 resonates with capacitances 2I and I 6, the current may be considered as flowing downward through the inductance I5 and then dividing and flowing in opposite directions through inductances I1 and I8 and hence upward through condensers I6 and 2
  • inductances IT and I8 have a ratio to each other which is the inverse of that between capacitances 2I and I6, then zero voltage exists between the cathode 2 of discharge device I and ground I2.
  • the screen grid 4 of the discharge device I of Fig. 1 is shown as supplied with operating potential from the terminal through a resistance 22 and an inductance 23 and as being connected directly to cathode 2 through a large bypass condenser 24.
  • the suppressor grid 5 is shown connected directly to the cathode 2 of the discharge device.
  • an electron discharge device having an anode and cathode, a capacitive load connected between said anode and cathode through an inductance and a second inductance connected between said anode and an interme- 5 diate point on said first inductance, said point cathode is at ground potential at the operating frequency.
  • an electron discharge device having an anode, and a cathode, a capacitive load contacted between said anode and ground, an inductance between said cathode and ground and an inductance between said anode and a point dividing said first inductance into two parts having a ratio therebetween equal to the ratio of the capacity between said anode and cathode to the capacitance of said load.
  • a pair of electron discharge devices connected in cascade, one of said devices having a cathode; and output electrode and th other having a cathode and input electrode, the latter of said cathodes being grounded, an inductance between said cathodes, and a second inductance having one terminal connected to said input and output electrodes and its other termi- 35 nal connected to a point'on said first inductance such that said first cathode is maintained at ground potential atthe operating frequency.
  • connection between said anode and cathode including a capacitive load device a connection between said control electrode and cathode including a source of radio frequency electromotive force to be amplified, said connections including a common conductor extending to said cathode, said common conductor having length sufficient toproduce undesired feedback from said anode to said controlelectrode, and an inductance connected between said anode and a point intermediate of the length of said common conductor such that substantially zero voltage exists between the ends of said common conductor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
US447939A 1942-06-22 1942-06-22 Electron discharge amplifier Expired - Lifetime US2335050A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE474424D BE474424A (is") 1942-06-22
US447939A US2335050A (en) 1942-06-22 1942-06-22 Electron discharge amplifier
GB9808/43A GB564243A (en) 1942-06-22 1943-06-18 High frequency electron discharge amplifiers
FR938658D FR938658A (fr) 1942-06-22 1946-10-18 Perfectionnements aux amplificateurs haute fréquence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US447939A US2335050A (en) 1942-06-22 1942-06-22 Electron discharge amplifier

Publications (1)

Publication Number Publication Date
US2335050A true US2335050A (en) 1943-11-23

Family

ID=23778357

Family Applications (1)

Application Number Title Priority Date Filing Date
US447939A Expired - Lifetime US2335050A (en) 1942-06-22 1942-06-22 Electron discharge amplifier

Country Status (4)

Country Link
US (1) US2335050A (is")
BE (1) BE474424A (is")
FR (1) FR938658A (is")
GB (1) GB564243A (is")

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546247A (en) * 1947-12-17 1951-03-27 William C Wolf Process of recovering barite from its native materials
US2649508A (en) * 1948-11-12 1953-08-18 Bell Telephone Labor Inc Interstage coupling circuit for wide band amplifiers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546247A (en) * 1947-12-17 1951-03-27 William C Wolf Process of recovering barite from its native materials
US2649508A (en) * 1948-11-12 1953-08-18 Bell Telephone Labor Inc Interstage coupling circuit for wide band amplifiers

Also Published As

Publication number Publication date
GB564243A (en) 1944-09-19
BE474424A (is")
FR938658A (fr) 1948-10-21

Similar Documents

Publication Publication Date Title
US2359504A (en) High frequency selective system and method
US2197124A (en) Oscillator with amplifier coupling
US2335050A (en) Electron discharge amplifier
US2729708A (en) Band-pass amplifier systems
US2444864A (en) High-frequency tuned amplifying circuit
US2271519A (en) Neutralizing system
US2197239A (en) Stabilized tuned system
US2226259A (en) Amplifier
US1993783A (en) Oscillation generator
US1925520A (en) Frequency multiplication
US2430699A (en) Amplifier gain control
US2310455A (en) Ultra short wave amplifier circuit
US2113340A (en) Ultrahigh frequency oscillator
US2411565A (en) Low impedance oscillator
US2427241A (en) Push-pull circuit arrangement for ultra-short waves
US2373184A (en) Ultra high frequency vacuum tube circuit
US2235198A (en) Anode neutralizing circuit for short waves
US2314916A (en) Circuit for the amplification and/or frequency-transformation of electrical oscillations of ultra high frequency
US2026944A (en) Means for receiving and amplifying electric signals
US2344734A (en) Neutralizing circuit
US1971919A (en) Negative conductance circuits
US2228081A (en) Correction circuits
US2235565A (en) Tuned circuit system
US2211718A (en) Ultra-high-frequency signaltranslating stage
US2251629A (en) Parasitic oscillation elimination