US1795194A - Apparatus for amplifying electrical energy - Google Patents

Apparatus for amplifying electrical energy Download PDF

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Publication number
US1795194A
US1795194A US205203A US20520327A US1795194A US 1795194 A US1795194 A US 1795194A US 205203 A US205203 A US 205203A US 20520327 A US20520327 A US 20520327A US 1795194 A US1795194 A US 1795194A
Authority
US
United States
Prior art keywords
circuit
capacity
resistance
transformer
inductance
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
US205203A
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English (en)
Inventor
Rudolph A Bierwirth
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 NL27990D priority Critical patent/NL27990C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US205203A priority patent/US1795194A/en
Priority to GB14112/28A priority patent/GB293788A/en
Priority to DEI34540D priority patent/DE544807C/de
Priority to FR660695D priority patent/FR660695A/fr
Application granted granted Critical
Publication of US1795194A publication Critical patent/US1795194A/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
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Definitions

  • My invention relates to apparatus for amplifying electrical energy, such as that util ized in communication systems and the like, and has for its principal object the provision of an improved apparatus and method of operation which may be utilized over a wide range of audio frequencies without substantial change in the ratio of amplification.
  • Fig. 1 shows an amplifying apparatus wherein my invention has been'embodied; and Fig. 2 relates to the operation of the apparatus shown by Fig. 1.
  • Y shows an amplifying apparatus wherein my invention has been'embodied; and Fig. 2 relates to the operation of the apparatus shown by Fig. 1.
  • the winding 7 may be replaced by a transa" former provided with separate-primary and secondary circuits and that its intermediate terminal may be ad]usted for the purpose of r
  • the incluctances L and L of the windings 6 and 7 and the capacity C of the condenser 8 bear a certain definite relation to the anode or plate circuit resistance R of thedevicet and the primary circuit resistance R of the
  • This apparatus comprises input terminals 1 and output terminals 2 which are interconnected through means comprising a transformer 3, space discharge devices 4L and 5, o and'a coupling element consisting of wind-. ings 6 and 7 and a condenser 8 connected between one terminal of the winding 6 and a terminal intermediate theends of the winding '2 which may function as an auto-trans
  • the relation between the resistance of the device 4, which may be any device having resistance without appreciable inductance the inductance 6; the capacity 8, and the resistance and reaetance of the primary circuit H 1 1 1 may be expressed as follows.
  • the internal resistance of the device 4 plus the resistance of the primary circuit of the transformer 7 is made substantially equal to each of the reactance of the capacity 8, to the reactance of the primary circuit of transformer 7, and to one half the reactance of the inductance 6 at the lowest frequency in the range of frequencies which it is desired to amplify substantially uniformly.
  • FIG. 2 shows the results determined experimentally with L henries, L 37 henries,
  • tl l microfarad
  • f 27 cycles
  • R 5100
  • a 1 to 4r transformer ratio It will be observed that between 30 and 7000 cycles there is a variation in the ratio 05 AME of only about three percent. This shows that the amplification ratio of the apparatus is substantially constant throughout the entire audio frequency range.
  • an audio frequency amplifier the combination of a space discharge deviCeprovided with an anode circuit, an inductance connected in said'circuit, a capacity, and a transformer provided with a primary circuit connected to said anode circuit through said capacity, the internal resistance of the space discharge device plus the resistance of the primary circuit of the transformer being substantially equal to each of the reactance of the capacity, to the reactance of the primary circuit, and to one half the reactance of the inductance at the lowest frequency in the range of audio frequencies which it is desired to amplify substantially uniformly.
  • an audio frequency amplifier the combination of a pair of space discharge devices each provided with an input and an output circuit, an inductance connected in theoutput circuit of one of said devices, a capacity, and a transformer provided with a primary circuit connected to said output circuit through said capacity and with a secondary circuit connected in the input circuit of the other of said devices, the internal resistance of said one of said devices plus that.
  • An audio frequency amplifying apparatus including a space discharge device provided with an anode circuit, an inductance connectedin said anode circuit, a capacity, and a transformer provided with a primary circuit connected to said anode circuit through said capacity, the magnitudeof said" inductance in henries being substantially equal to .373 times the resistance of said anode circuit in ohms divided by the lowest audio frequency in cycles per second which it is desired to amplify.
  • An audio frequencyiamplifying apparatus including aspace discharge device provided with an anodecircuit, an inductance connected in said anode circuit, a capacity, and a transformer provided with a prlmarycircuit connected to 'said anode circuit m through said capacity, the magnitude of said capacity in microfarads being substantially equal to the quotient obtained by dividing .159 by the product of the lowest audio frequency in cycles per second which it is de sired to amplify and the sum of the resistance of said anode circuit 111 ohms and .75 times the resistance" of said primary circuit in vice in ohms'and inversely proportional to the lowest frequency which it is desired to transmit through said element. 7
  • audio frequency transformer having a pri- 'mary circuit connected with said output circuit through said capacity, the reactances of said capacity and of said primary circuit at ance of said device plus that of the primary circuit, and'means for supplying currentto said output circuit including an impedance having a reactance at said lowest audio frequency greater than that of said primary clrcuit.
  • An audio frequency amplifying apparatus including a space discharge device provided with an anode circuit, an inductance connected in said anode circuit, a capacity, and a transformer provided with a primary circuit connected to said anode circuit through said capacity, the magnitude of said inductance in henries being substantially equal to .373 times the resistance of said anode circuit in ohms divided by the lowest audio frequency in cycles per second Which it is desired to amplify, the inductance of said primary circuit in henries being substantially equal to the lowest audio frequency in cycles per second that it is desired to amplify divided into the sum of .159 times the resistance of said anode circuit in ohms and .188

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • General Induction Heating (AREA)
US205203A 1927-07-12 1927-07-12 Apparatus for amplifying electrical energy Expired - Lifetime US1795194A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL27990D NL27990C (de) 1927-07-12
US205203A US1795194A (en) 1927-07-12 1927-07-12 Apparatus for amplifying electrical energy
GB14112/28A GB293788A (en) 1927-07-12 1928-05-14 Improvements in and relating to apparatus for amplifying electrical energy
DEI34540D DE544807C (de) 1927-07-12 1928-06-02 Einrichtung zur Verstaerkung elektrischer Stroeme mittels Entladungsroehren
FR660695D FR660695A (fr) 1927-07-12 1928-07-12 Perfectionnements apportés à l'amplification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US205203A US1795194A (en) 1927-07-12 1927-07-12 Apparatus for amplifying electrical energy

Publications (1)

Publication Number Publication Date
US1795194A true US1795194A (en) 1931-03-03

Family

ID=22761234

Family Applications (1)

Application Number Title Priority Date Filing Date
US205203A Expired - Lifetime US1795194A (en) 1927-07-12 1927-07-12 Apparatus for amplifying electrical energy

Country Status (5)

Country Link
US (1) US1795194A (de)
DE (1) DE544807C (de)
FR (1) FR660695A (de)
GB (1) GB293788A (de)
NL (1) NL27990C (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977626C (de) * 1951-04-04 1967-09-21 Rca Corp Kaskodeverstaerker fuer hohe Frequenzen

Also Published As

Publication number Publication date
FR660695A (fr) 1929-07-16
DE544807C (de) 1932-02-24
GB293788A (en) 1929-08-08
NL27990C (de)

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