GB779884A - Improvements in or relating to transistor circuit arrangements - Google Patents

Improvements in or relating to transistor circuit arrangements

Info

Publication number
GB779884A
GB779884A GB34812/54A GB3481254A GB779884A GB 779884 A GB779884 A GB 779884A GB 34812/54 A GB34812/54 A GB 34812/54A GB 3481254 A GB3481254 A GB 3481254A GB 779884 A GB779884 A GB 779884A
Authority
GB
United Kingdom
Prior art keywords
photo
transistor
relating
transistor circuit
circuit arrangements
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
GB34812/54A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB779884A publication Critical patent/GB779884A/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
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

779,884. Photo-transistor circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 1, 1954 [Dec. 4, 1953], No. 34812/54. Class 40 (3). [Also in Group XL (c)] At least one connection between the terminals 11, 11<SP>1</SP> or 12, 121 is constituted by a photo - transistor 24, a light source 7 causing it to present a low or high resistance. Resistors 21, 22 of intermediate value increase the signal attenuation when a high resistance is in the series path but have little effect when the photo-transistor presents a low resistance. The photo-transistor and light source may be used to limit a signal, Fig. 5 (not shown).
GB34812/54A 1953-12-04 1954-12-01 Improvements in or relating to transistor circuit arrangements Expired GB779884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL332991X 1953-12-04

Publications (1)

Publication Number Publication Date
GB779884A true GB779884A (en) 1957-07-24

Family

ID=19784432

Family Applications (2)

Application Number Title Priority Date Filing Date
GB30877/56A Expired GB779885A (en) 1953-12-04 1954-12-01 Improvements in or relating to transistor circuit arrangements for simulating a variable electric resistance
GB34812/54A Expired GB779884A (en) 1953-12-04 1954-12-01 Improvements in or relating to transistor circuit arrangements

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB30877/56A Expired GB779885A (en) 1953-12-04 1954-12-01 Improvements in or relating to transistor circuit arrangements for simulating a variable electric resistance

Country Status (4)

Country Link
BE (1) BE533822A (en)
CH (1) CH332991A (en)
GB (2) GB779885A (en)
NL (1) NL183359B (en)

Also Published As

Publication number Publication date
BE533822A (en)
NL183359B (en)
CH332991A (en) 1958-09-30
GB779885A (en) 1957-07-24

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