ES301925A1 - Improvements in amplifiers - Google Patents

Improvements in amplifiers

Info

Publication number
ES301925A1
ES301925A1 ES0301925A ES301925A ES301925A1 ES 301925 A1 ES301925 A1 ES 301925A1 ES 0301925 A ES0301925 A ES 0301925A ES 301925 A ES301925 A ES 301925A ES 301925 A1 ES301925 A1 ES 301925A1
Authority
ES
Spain
Prior art keywords
emitter circuit
circuit resistor
transistors
linear
passed
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
ES0301925A
Other languages
Spanish (es)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of ES301925A1 publication Critical patent/ES301925A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/10—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with diodes
    • H03F3/12—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with diodes with Esaki diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers
    • H03G5/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H03G5/12—Manually-operated control in untuned amplifiers having semiconductor devices incorporating negative feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Picture Signal Circuits (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

In an arrangement for correcting aperture distortion in television signals, part of the signal is passed from input terminal E to output terminal S via a transistor amplifier T3, provided with negative feedback by, means of emitter circuit resistor R4, and which is linear both as regards frequency and phase. Signals are also passed via a second path, comprising transistors T1, T2 in which the phase response is linear but the gain is proportional to the square of the frequency. Each of the transistors T1, T2 has an emitter circuit resistor R1, R3 respectively, of a much greater value than the respective collector circuit resistor R2, R5 and these emitter circuit resistors are shunted by capacitors C2, C4 comprising voltage variable capacitance junction diodes. Series-connected blocking capacitors C1, C3 enable the response to be controlled from a remote point by means of potentiometer P.
ES0301925A 1963-07-11 1964-07-10 Improvements in amplifiers Expired ES301925A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR941099A FR1375772A (en) 1963-07-11 1963-07-11 Improvements to amplifiers

Publications (1)

Publication Number Publication Date
ES301925A1 true ES301925A1 (en) 1965-01-01

Family

ID=8808063

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0301925A Expired ES301925A1 (en) 1963-07-11 1964-07-10 Improvements in amplifiers

Country Status (10)

Country Link
AT (1) AT245063B (en)
BE (1) BE649319A (en)
CH (1) CH402952A (en)
DE (1) DE1199316B (en)
ES (1) ES301925A1 (en)
FR (1) FR1375772A (en)
GB (1) GB1065503A (en)
NL (1) NL149054B (en)
OA (1) OA00048A (en)
SE (1) SE316201B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555748B1 (en) * 1992-02-14 1998-05-13 Robert Bosch Gmbh Amplifier stage with negative feedback

Also Published As

Publication number Publication date
AT245063B (en) 1966-02-10
SE316201B (en) 1969-10-20
FR1375772A (en) 1964-10-23
NL149054B (en) 1976-03-15
GB1065503A (en) 1967-04-19
CH402952A (en) 1965-11-30
NL6407855A (en) 1965-01-12
OA00048A (en) 1966-01-15
DE1199316B (en) 1965-08-26
BE649319A (en) 1964-10-16

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