US1791435A - Amplifying apparatus - Google Patents

Amplifying apparatus Download PDF

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Publication number
US1791435A
US1791435A US242475A US24247527A US1791435A US 1791435 A US1791435 A US 1791435A US 242475 A US242475 A US 242475A US 24247527 A US24247527 A US 24247527A US 1791435 A US1791435 A US 1791435A
Authority
US
United States
Prior art keywords
grid
circuit
anode
electron
cathode
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
US242475A
Other languages
English (en)
Inventor
Browder J Thompson
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 DEI36508D priority Critical patent/DE487383C/de
Priority to NL25458D priority patent/NL25458C/xx
Priority to BE356804D priority patent/BE356804A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US242475A priority patent/US1791435A/en
Priority to GB36970/28A priority patent/GB303008A/en
Priority to FR666167D priority patent/FR666167A/fr
Application granted granted Critical
Publication of US1791435A publication Critical patent/US1791435A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers

Definitions

  • My present invention relatesto amplifying apparatus, and more particularly to circuit arrangements employed with electron dis charge devices to obtain regenerative amplification with high frequency currents.
  • the object of my invention is to overcome this disadvantage and providean amplifying 'mentalitles it is possible to system in which regenerative amplification is usefully employed and in which the degree of amplification which may be obtained will be substantially the same throughout the range of frequencies for which the system is intended to operate without any necessity for adjusting the regenerative connections as the frequency is varied.
  • I provide two separate means for producing regenerative amplication, oneof which is most efi'ective at the higher frequencies and the other of which is most efiective at the lower frequencies.
  • an electron discharge device 1 of the four-electrode type having an electron emittingcathode 2, an anode 3 and two grids 4 and 5.
  • This device may be constructed in any desired way so that the electron stream in flowing from the cathode tothe anode 3 passes successively the two grids 4 and 5.
  • the grid 4 is connected to a portion of the battery 6 so that it has impressed thereon a suitable positive potential with reference to to. operate efiiciently as a space charge grid.
  • the grid 5 is employed in the usual manner to control the electron stream through the device.
  • the device may operate as a detector of high frequency currents impressedupon it from the antenna 10.
  • the output circuit of the device includes all of the battery 6, the tickler or feedback coil 12 which is inductively coupled to the input circuit so as to provide a feed-back of energy for the purpose of giving regenerative amplification.
  • an impedance rload conin potential of the plate or anode By rea-- son of the'capacity between the two grids a feed-back action may be produced between the two grids which will affect the potential of the control grid 5 and thereby modify the amplifying action of the device.
  • this potential fed back through the capacity between the grids may assist in producing amplification the. reactance of the space charge grid circuit must be capacitive, therefore, as above stated, I adjust the v space charge grid so that it has a suificient.
  • the feed-back coil l2 on the other hand is adjusted so as to give the maximum degree of amplification desired at the highest frequency which the system is intended to amplify. If it remains fixed atthis point the regenerative amplification due to the feedback coil will decrease as the fre uency applied to the system decreases. T usit will be seen that the two means provided for producing amplification vary in opposite directlons as the .frequency varies. As a result it is possible by the joint action of the two means to obtain a substantially uniform degree of regenerative amplification over the entire range of frequencies at which the apparatus is designed to operate.
  • charge device having an electron emitting cathode and anode and two grids which are successively passed by the electron stream, of separate circuits connecting the cathode with each of the other electrodes, means for impressing high frequency oscillations on the circuit of the grid nearest the anode, an inductive feedback connection from the anode I circuit to the grid circuit upon which high frequency oscillations are impressed, and g a means for producinga capacitive reactanc in the circuit of the other grid.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Lasers (AREA)
  • Plasma Technology (AREA)
US242475A 1927-12-24 1927-12-24 Amplifying apparatus Expired - Lifetime US1791435A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DEI36508D DE487383C (de) 1927-12-24 Hochfrequenzverstaerker mit Rueckkopplung
NL25458D NL25458C (de) 1927-12-24
BE356804D BE356804A (de) 1927-12-24
US242475A US1791435A (en) 1927-12-24 1927-12-24 Amplifying apparatus
GB36970/28A GB303008A (en) 1927-12-24 1928-12-14 Improvements in and relating to amplifying apparatus
FR666167D FR666167A (fr) 1927-12-24 1928-12-21 Perfectionnements aux amplificateurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US242475A US1791435A (en) 1927-12-24 1927-12-24 Amplifying apparatus

Publications (1)

Publication Number Publication Date
US1791435A true US1791435A (en) 1931-02-03

Family

ID=22914913

Family Applications (1)

Application Number Title Priority Date Filing Date
US242475A Expired - Lifetime US1791435A (en) 1927-12-24 1927-12-24 Amplifying apparatus

Country Status (6)

Country Link
US (1) US1791435A (de)
BE (1) BE356804A (de)
DE (1) DE487383C (de)
FR (1) FR666167A (de)
GB (1) GB303008A (de)
NL (1) NL25458C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865986A (en) * 1953-08-03 1958-12-23 Louis W Parker High power frequency discriminator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865986A (en) * 1953-08-03 1958-12-23 Louis W Parker High power frequency discriminator

Also Published As

Publication number Publication date
BE356804A (de)
FR666167A (fr) 1929-09-27
GB303008A (en) 1930-02-06
NL25458C (de)
DE487383C (de) 1929-12-09

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