GB945509A - Improvements in transistor circuits - Google Patents

Improvements in transistor circuits

Info

Publication number
GB945509A
GB945509A GB133761A GB133761A GB945509A GB 945509 A GB945509 A GB 945509A GB 133761 A GB133761 A GB 133761A GB 133761 A GB133761 A GB 133761A GB 945509 A GB945509 A GB 945509A
Authority
GB
United Kingdom
Prior art keywords
diode
transistor
control
jan
adjustable
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
GB133761A
Inventor
Robert Barrass
Gordon Malcolm Edge
Peter John Wynn Rayner
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.)
Pye Electronic Products Ltd
Original Assignee
Pye 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 Pye Ltd filed Critical Pye Ltd
Priority to GB133761A priority Critical patent/GB945509A/en
Publication of GB945509A publication Critical patent/GB945509A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes

Landscapes

  • Selective Calling Equipment (AREA)

Abstract

945,509. Transistor circuits. PYE Ltd. Jan. 12, 1962 [Jan. 12, 1961], No. 1337/61. Heading H3T. A transistor amplifier has a semi-conductor diode and a capacitor connected between one electrode of a transistor and a point of zero signal potential, the small signal impedance of the diode being adjustable by a D.C. voltage so as to provide a remote tone control. In Fig. 2A, the negative feedback at lower frequencies is adjustable by variation of the control voltage supplied to the diode 5. In Fig. 4A, the variable impedance diode 5 controls the proportion of lower frequency signals shunted from the base circuit. The lower capacitors are omitted in Figs. 1A, 3A (not shown), so that a control of output at higher frequencies is achieved.
GB133761A 1961-01-12 1961-01-12 Improvements in transistor circuits Expired GB945509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB133761A GB945509A (en) 1961-01-12 1961-01-12 Improvements in transistor circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB133761A GB945509A (en) 1961-01-12 1961-01-12 Improvements in transistor circuits

Publications (1)

Publication Number Publication Date
GB945509A true GB945509A (en) 1964-01-02

Family

ID=9720244

Family Applications (1)

Application Number Title Priority Date Filing Date
GB133761A Expired GB945509A (en) 1961-01-12 1961-01-12 Improvements in transistor circuits

Country Status (1)

Country Link
GB (1) GB945509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5047545A (en) * 1973-08-28 1975-04-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5047545A (en) * 1973-08-28 1975-04-28

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