GB1086016A - Improvements in or relating to broad-band amplifiers - Google Patents

Improvements in or relating to broad-band amplifiers

Info

Publication number
GB1086016A
GB1086016A GB1457166A GB1457166A GB1086016A GB 1086016 A GB1086016 A GB 1086016A GB 1457166 A GB1457166 A GB 1457166A GB 1457166 A GB1457166 A GB 1457166A GB 1086016 A GB1086016 A GB 1086016A
Authority
GB
United Kingdom
Prior art keywords
amplifier
drift
input
output
main amplifier
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
GB1457166A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1086016A publication Critical patent/GB1086016A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
    • H03F3/40—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only

Landscapes

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

Abstract

1,086,016. Amplifying circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. April 1, 1966 [April 6, 1965], No. 14571/66. Heading H3W. The invention relates to a direct-current amplifier of the type in which drift in a main amplifier 1 is prevented by means of a potentiometer R2, R1 connected on the one hand to the input of the main amplifier 1 and on the other to its output, via an attenuating network 7. The arrangement is such that in the absence of drift no potential appears at point A in the potentiometer; if drift occurs, however, there is a voltage which is fed back into the main amplifier 1 via an auxiliary amplifier 8, which may be of the " chopper " type, including demodulator 9, so as to correct for the drift. If such an arrangement is used for amplifying an A.C. voltage which is superimposed on a D.C. component, by switching a blocking capacitor C 1 between the source E and the amplifier input, leakage over the leakage resistance R of the capacitor C 1 can produce such a D.C. input to the amplifier as to cause overload or excessive zero shift in an oscillograph 6 connected to the output. To prevent this, a further capacitor C2 is switched in series in the lead between the amplifier input and resistor R2, the feedback network then acting to reduce any D.C. component in the output of the main amplifier to zero.
GB1457166A 1965-04-06 1966-04-01 Improvements in or relating to broad-band amplifiers Expired GB1086016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6504353A NL146345B (en) 1965-04-06 1965-04-06 WIDE BAND AMPLIFIER.

Publications (1)

Publication Number Publication Date
GB1086016A true GB1086016A (en) 1967-10-04

Family

ID=19792857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1457166A Expired GB1086016A (en) 1965-04-06 1966-04-01 Improvements in or relating to broad-band amplifiers

Country Status (7)

Country Link
AT (1) AT259011B (en)
BE (1) BE679167A (en)
CH (1) CH483157A (en)
DE (1) DE1274193B (en)
GB (1) GB1086016A (en)
NL (1) NL146345B (en)
SE (1) SE315655B (en)

Also Published As

Publication number Publication date
BE679167A (en) 1966-10-06
NL6504353A (en) 1966-10-07
AT259011B (en) 1967-12-27
NL146345B (en) 1975-06-16
CH483157A (en) 1969-12-15
DE1274193B (en) 1968-08-01
SE315655B (en) 1969-10-06

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