GB514713A - Thermionic valve amplifying systems - Google Patents

Thermionic valve amplifying systems

Info

Publication number
GB514713A
GB514713A GB14355/38A GB1435538A GB514713A GB 514713 A GB514713 A GB 514713A GB 14355/38 A GB14355/38 A GB 14355/38A GB 1435538 A GB1435538 A GB 1435538A GB 514713 A GB514713 A GB 514713A
Authority
GB
United Kingdom
Prior art keywords
condenser
feedback
impedance
output
bridge
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
GB14355/38A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB514713A publication Critical patent/GB514713A/en
Expired legal-status Critical Current

Links

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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

514,713. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., ROCHE, A. H., and GOULLEE, S. J. May 13, 1938, No. 14355. [Class 40 (v)] In a negative feedback amplifier in which a blocking condenser in one arm of the output bridge has appreciable impedance another condenser is inserted in an adjacent arm of the bridge to maintain the output impedance constant. The Figure shows an amplifier in which a condenser C10 is added to the output bridge R<13>, R<14>, R<15>, to compensate for the condenser C<9>. A decoupling resistance is provided so that variation in the impedance of the HT supply does not affect the balance of the output bridge. Gain control may be obtained by changing the feedback connection from CA to CB in which case a resistance R' equal to R3 is preferably included in the feedback circuit to maintain the correct termination. With reduced feedback the link HF is preferably opened for the condenser C<8> which corrects for rise in the output impedance at high frequencies. Attenuation due to condenser C<8> is compensated by the shunt R<8>C<4> in the feedback path. Condenser C<7> in addition to serving as a blocking condenser may also adjust the gain-frequency characteristic, and may be proportioned to give a slight rise in gain at the lower frequencies.
GB14355/38A 1938-05-13 1938-05-13 Thermionic valve amplifying systems Expired GB514713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB224073X 1938-05-13

Publications (1)

Publication Number Publication Date
GB514713A true GB514713A (en) 1939-11-15

Family

ID=10178865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14355/38A Expired GB514713A (en) 1938-05-13 1938-05-13 Thermionic valve amplifying systems

Country Status (5)

Country Link
BE (1) BE434293A (en)
CH (1) CH224073A (en)
FR (1) FR853651A (en)
GB (1) GB514713A (en)
NL (2) NL93123B (en)

Also Published As

Publication number Publication date
NL62294C (en)
BE434293A (en)
FR853651A (en) 1940-03-26
NL93123B (en)
CH224073A (en) 1942-10-31

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