GB884301A - Improvements in or relating to transistor circuits - Google Patents

Improvements in or relating to transistor circuits

Info

Publication number
GB884301A
GB884301A GB1025558A GB1025558A GB884301A GB 884301 A GB884301 A GB 884301A GB 1025558 A GB1025558 A GB 1025558A GB 1025558 A GB1025558 A GB 1025558A GB 884301 A GB884301 A GB 884301A
Authority
GB
United Kingdom
Prior art keywords
transistor
transistors
resistor
capacitor
base
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
GB1025558A
Inventor
Leonard Charles Abbott
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.)
RE Dietz Co
Original Assignee
RE Dietz Co
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
Priority to US621343A priority Critical patent/US2829257A/en
Application filed by RE Dietz Co filed Critical RE Dietz Co
Priority to GB1025558A priority patent/GB884301A/en
Priority to DED27769A priority patent/DE1129528B/en
Publication of GB884301A publication Critical patent/GB884301A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2826—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistors of the complementary type
    • H03K3/2828—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistors of the complementary type in an asymmetrical circuit configuration
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/09—Circuit arrangements or apparatus for operating incandescent light sources in which the lamp is fed by pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

884,301. Visible signalling apparatus. DIETZ CO., R. E. March 31, 1958, No. 10255/58. Class 118. [Also in Group XL (c)] A transistor oscillator for operating a flashing- light beacon comprises two normally non-conductive transistors one of which is connected in series with a load resistor (the flashing lamp) across a suitably poled D.C. supply and the other of which is associated with a condenser charging circuit whereby it is periodically rendered conductive, the current through said other transistor being applied to said one transistor to cause it also to conduct so that a large current flows periodically through said load resistor. The circuit comprises two transistors 15, 20 of opposite conductivity types, the transistor 20 being connected as shown between the base electrode of transistor 15 and the junction point of the resistor 12 and capacitor 14 connected in series with signal lamp 11 across the battery 10. A bias potential is applied to the base of transistor 20 by means of resistors 27, 28 to hold the transistor normally non-conductive. When, however, due to the charging of capacitor 14 the emitter potential of transistor 20 becomes more negative than that of the base electrode the transistor conducts, thus applying a current to the transistor 15 which also conducts. As a consequence the point 32 becomes more positive so that the base of resistor 20 also becomes more positive and conduction in transistor 20 increases cumulatively. The conduction in transistor 15 increases similarly and the lamp 11 is lighted. This continues until capacitor 14 has discharged through transistor 20 to such an extent that the transistors are no longer held fully conductive whereupon a reverse cumulative process occurs and both transistors are switched off. The cycle then repeats itself with the charging of capacitor 14. In a modification, Fig. 2 (not shown), a resistor, which may be arranged in series with a suitably poled D.C. source, is connected between the base of transistor 15 and earth. By this means leakage currents flowing in the transistor 20 are bypassed to earth.
GB1025558A 1956-11-09 1958-03-31 Improvements in or relating to transistor circuits Expired GB884301A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US621343A US2829257A (en) 1956-11-09 1956-11-09 Transistor oscillator circuit
GB1025558A GB884301A (en) 1958-03-31 1958-03-31 Improvements in or relating to transistor circuits
DED27769A DE1129528B (en) 1958-03-31 1958-03-31 Circuit arrangement for generating powerful pulses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1025558A GB884301A (en) 1958-03-31 1958-03-31 Improvements in or relating to transistor circuits

Publications (1)

Publication Number Publication Date
GB884301A true GB884301A (en) 1961-12-13

Family

ID=9964492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1025558A Expired GB884301A (en) 1956-11-09 1958-03-31 Improvements in or relating to transistor circuits

Country Status (1)

Country Link
GB (1) GB884301A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133852U (en) * 1974-04-20 1975-11-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133852U (en) * 1974-04-20 1975-11-04

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