US2006969A - Amplifying device - Google Patents

Amplifying device Download PDF

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Publication number
US2006969A
US2006969A US702160A US70216033A US2006969A US 2006969 A US2006969 A US 2006969A US 702160 A US702160 A US 702160A US 70216033 A US70216033 A US 70216033A US 2006969 A US2006969 A US 2006969A
Authority
US
United States
Prior art keywords
grid
circuit
plate
cathode
signal
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
US702160A
Other languages
English (en)
Inventor
Steimel Karl
Klotz Ernst
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2006969A publication Critical patent/US2006969A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/46—Reflex amplifiers
    • H03F3/48—Reflex amplifiers with tubes only
    • 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

  • An object of the present invention is to provide a vacuum tube amplifier having at least four grids and utilizing such an amplifier tube to amplify both radio and audio frequency os- 5 cillations.
  • a further object-of the invention is to control one of the grids of such an amplifier by means of the modulation voltage developed in the plate circuit of a diode detector which is coupled to one of the grid circuits of the radio frequency amplifier portion of the tube.
  • the radio frequency voltage obtained in the circuit of the third grid on a distinct and independent rectifier, such as a diode or plate rectifier or the like and to impress the audio frequency voltage separated therefrom, after complete or partial elimination of radio frequency currents, upon the fourth grid and ensure audio frequency amplification between this grid and the plate.
  • a distinct and independent rectifier such as a diode or plate rectifier or the like
  • the audio frequency voltage separated therefrom after complete or partial elimination of radio frequency currents
  • the antenna may be connected to the first grid circuit by primary 5 and secondary coil 6 the latter being tuned to the desired incoming signal frequency by variable condenser 1.
  • the screen grid 2 is connected to a positive source of potential, while grid 3, which serves as the plate of the radio frequency amplifier portion of the tube, "is connected to any desired positive source'of potential such as a battery 23 through primary 15 of a radio frequency transformer whose secondary l6 may be tuned to the signal frequency by a variable condenser E1.
  • the ends of coil [6 are connected to the plate l9 and cathode 20 of a diode vacuum tube detector l8, a high resistance l3 shunted by a by-pass condenser 2
  • the modulation v0ltage of the incoming signal as developed across resistance [3 is impressed through condenser l0,
  • the cathodes of the amplifier tube and detector tube may be connected together by a lead 22, as shown.
  • amplified audio frequency current of the plate circuit may be supplied to the output terminals 9 through the audio transformer 14 whose primary 8 is in the plate circuit.
  • a vacuum tube having a cathode, a signal control grid, a second grid, a plate and an auxiliary grid located between said plate and second grid, a circuit tuned to the signal frequency connected between said signal control grid and cathode, a load circuit connected between said second grid and cathode, a detector coupled to said load circuit, means for impressing the detected current on said auxiliary grid and an output circuit connected to said plate.
  • a vacuum tube having a cathode, a signal control grid, a third grid, a screen grid located between said signal grid and said third grid, an anode, an auxiliary grid, means for applying a positive potential to said screen grid, acircuit tunable to the signal frequency connected between said signal grid and cathode, means for impressing modulated .radio frequency signal currents on said tunable circuit, a load circuit connected between said third grid and cathode, a detector coupled to said load circuit and connections between said detector and said auxiliary grid arranged to impress the detected currents thereon, and an output circuit connected to said anode.
  • a vacuum tube having a cathode, a signal control grid, a third grid, a screen grid positioned between said named grids, an anode, an auxiliary grid positioned between said third grid and anode, means for maintaining said screen grid at a constant positive potential, a circuit tunable to the signal frequency connected between said signal grid and cathode, means for impressing modulated radio frequency currents on said tunable circuit, a load circuit including the primary of a radio frequency transformer connected between said third grid and cathode, means for tuning the secondary of said transformer to the signal frequency, a diode detector having its plate connected to one end of said secondary coil, a high resistance connected between the other end of said secondary coil and the cathode of said diode detector, a circuit connecting the last named end of said secondary coil to said auxiliary grid, and a circuit connected to the plate of said tube arranged to transfer the amplified audio frequency currents to a pair of output terminals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Surgical Instruments (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Microwave Tubes (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
US702160A 1932-07-24 1933-12-13 Amplifying device Expired - Lifetime US2006969A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DET41106D DE640517C (de) 1932-07-24 1932-07-24 Rueckkopplungsschaltung zur Verstaerkung elektrischer Schwingungen
DET41894D DE666191C (de) 1932-07-24 1932-12-29 Schaltung zur Mehrfachverstaerkung elektrischer Schwingungen

Publications (1)

Publication Number Publication Date
US2006969A true US2006969A (en) 1935-07-02

Family

ID=34066220

Family Applications (1)

Application Number Title Priority Date Filing Date
US702160A Expired - Lifetime US2006969A (en) 1932-07-24 1933-12-13 Amplifying device

Country Status (7)

Country Link
US (1) US2006969A (en, 2012)
AT (2) AT141275B (en, 2012)
CH (2) CH166025A (en, 2012)
DE (2) DE640517C (en, 2012)
DK (3) DK50601C (en, 2012)
FR (1) FR758305A (en, 2012)
NL (2) NL41232C (en, 2012)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474978A (en) * 1944-09-01 1949-07-05 Int Standard Electric Corp Circuit arrangement for use with widely separated frequency bands
US2508936A (en) * 1943-03-03 1950-05-23 Hartford Nat Bank & Trust Co Reflex amplifier circuit arrangement
US2525151A (en) * 1945-02-21 1950-10-10 Hazeltine Research Inc Wave-signal receiver

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL51540C (en, 2012) * 1934-05-22
DE755332C (de) * 1937-09-03 1954-03-01 Telefunken Gmbh Einrichtung zum stoerungsfreien Betrieb von Roehren mit Bremsgitter in Kurzwellenschaltungen
US3107333A (en) * 1960-04-14 1963-10-15 Hallicrafters Co Regenerative circuit in an i. f. amplifier stage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508936A (en) * 1943-03-03 1950-05-23 Hartford Nat Bank & Trust Co Reflex amplifier circuit arrangement
US2474978A (en) * 1944-09-01 1949-07-05 Int Standard Electric Corp Circuit arrangement for use with widely separated frequency bands
US2525151A (en) * 1945-02-21 1950-10-10 Hazeltine Research Inc Wave-signal receiver

Also Published As

Publication number Publication date
AT143039B (de) 1935-10-10
FR758305A (fr) 1934-01-15
NL38500C (en, 2012)
DK49718C (da) 1935-01-02
DK50601C (da) 1935-09-02
DE640517C (de) 1937-01-06
DK48823C (da) 1934-06-04
AT141275B (de) 1935-04-10
CH166024A (de) 1933-12-15
DE666191C (de) 1938-10-13
NL41232C (en, 2012)
CH166025A (de) 1933-12-15

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