GB848605A - Improvements in and relating to transistor circuits - Google Patents

Improvements in and relating to transistor circuits

Info

Publication number
GB848605A
GB848605A GB26896/58A GB2689658A GB848605A GB 848605 A GB848605 A GB 848605A GB 26896/58 A GB26896/58 A GB 26896/58A GB 2689658 A GB2689658 A GB 2689658A GB 848605 A GB848605 A GB 848605A
Authority
GB
United Kingdom
Prior art keywords
transistor
bias
aug
overcome
circuit
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
GB26896/58A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB848605A publication Critical patent/GB848605A/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
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only

Landscapes

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

Abstract

848,605. Transistor protection circuits. PHILCO CORPORATION. Aug. 21, 1958 [Aug. 27, 1957], No. 26896/58. Class 40(6). A transistor circuit comprises a junction transistor connected in a common emitter circuit, having forward bias in the input circuit, and a unilaterally conductive device serially connected in the input circuit to prevent reverse flow of base current in the event of an input signal of alternating polarity attaining a value sufficient to overcome the bias, whilst permitting substantially unimpeded flow of current in the forward direction. In the embodiment shown in Fig. 1, the forward bias for the PNP transistor 11 is provided by the potential divider 17, 18 across the battery 19. A diode 20 (for example a germanium diode or a reject transistor) is connected in series with the base, the polarity being such as to prevent base current flowing in the reverse direction should the signal amplitude be sufficient to overcome the bias.
GB26896/58A 1957-08-27 1958-08-21 Improvements in and relating to transistor circuits Expired GB848605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US848605XA 1957-08-27 1957-08-27

Publications (1)

Publication Number Publication Date
GB848605A true GB848605A (en) 1960-09-21

Family

ID=22187674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26896/58A Expired GB848605A (en) 1957-08-27 1958-08-21 Improvements in and relating to transistor circuits

Country Status (1)

Country Link
GB (1) GB848605A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155487B (en) * 1961-10-25 1963-10-10 Licentia Gmbh Arrangement for achieving a positive base bias in transistors in switching amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155487B (en) * 1961-10-25 1963-10-10 Licentia Gmbh Arrangement for achieving a positive base bias in transistors in switching amplifiers

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