GB1301697A - - Google Patents

Info

Publication number
GB1301697A
GB1301697A GB937570A GB937570A GB1301697A GB 1301697 A GB1301697 A GB 1301697A GB 937570 A GB937570 A GB 937570A GB 937570 A GB937570 A GB 937570A GB 1301697 A GB1301697 A GB 1301697A
Authority
GB
United Kingdom
Prior art keywords
emitter
transistor
terminal
base
stable state
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
GB937570A
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 filed Critical
Publication of GB1301697A publication Critical patent/GB1301697A/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
    • H03K3/284—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 monostable

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Pulse Circuits (AREA)

Abstract

1301697 Transistor monostable circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 26 Feb 1970 [1 March 1969] 9375/70 Heading H3T A monostable multivibrator as shown is characterized in that the emitter of transistor 3 is connected to the base of transistor 1, while the base of 3 is coupled to a terminal 14 having on it a reference voltage -V R , this terminal also being connected to the emitter of 1 via a threshold element 16 whose theshold value is equal to the sum of the base of emitter function voltages of transistors 1 and 3. The pulse width is varied by a rheostat 13 connected either as shown or in the collector circuit of 3. In the stable state, 1 is bottomed, thereby charging capacitor 4 with the polarity shown; 2 and 3 are off. An input pulse at 17 is differentiated by 18; its leading edge has no effect but its trailing edge biases 1 off and tends to turn 3 on. 1 going off turns on 2, and this causes the emitter of 3 to go more positive and so definitely turn on. Capacitor 4 then discharges to the supply via 2 and 3 in series at a rate determined by the setting of 13. When it is sufficiently discharged the circuit switches back to its stable state. The output signal 21 is taken from terminal 20. The components other than the capacitors and variable resistor 13 may be made in integrated form. The threshold device 16 enables very short output pulses to be obtained.
GB937570A 1969-03-01 1970-02-26 Expired GB1301697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6903230A NL6903230A (en) 1969-03-01 1969-03-01

Publications (1)

Publication Number Publication Date
GB1301697A true GB1301697A (en) 1973-01-04

Family

ID=19806296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB937570A Expired GB1301697A (en) 1969-03-01 1970-02-26

Country Status (5)

Country Link
DE (1) DE2006211A1 (en)
ES (1) ES376797A1 (en)
FR (1) FR2033093A5 (en)
GB (1) GB1301697A (en)
NL (1) NL6903230A (en)

Also Published As

Publication number Publication date
FR2033093A5 (en) 1970-11-27
ES376797A1 (en) 1972-05-01
DE2006211A1 (en) 1970-09-17
NL6903230A (en) 1970-09-03

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees