GB1147219A - Improvements in or relating to astable multivibrators - Google Patents

Improvements in or relating to astable multivibrators

Info

Publication number
GB1147219A
GB1147219A GB33002/66A GB3300266A GB1147219A GB 1147219 A GB1147219 A GB 1147219A GB 33002/66 A GB33002/66 A GB 33002/66A GB 3300266 A GB3300266 A GB 3300266A GB 1147219 A GB1147219 A GB 1147219A
Authority
GB
United Kingdom
Prior art keywords
multivibrator
transistor
diode
astable
july
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
GB33002/66A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1147219A publication Critical patent/GB1147219A/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
    • H03K3/2823—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 transistor of the same conductivity type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Logic Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1,147,219. Astable multivibrators. SIEMENS A.G. 22 July, 1966 [23 July, 1965], No. 33002/66. Heading H3T. In an astable multivibrator a circuit is connected to the output electrodes of two amplifier stages T1, T2 of the multivibrator to derive a control signal which is applied asymmetrically to one input to change the state of one of the amplifier stages if the multivibrator fails to oscillate. As shown, if on starting transistors T1 and T2 both turn on, the network consisting of diodes D1, D2 and resistors R1, R2 allows diode D3 to conduct and connect a negative potential to the base of transistor T1; transistor T1 is turned off and the multivibrator starts, and continues to oscillate due to the normal cross-coupling capacitors C1, C2. When the multivibrator is oscillating the potentials applied to the diodes D1, D2 are such that the diode D3 is reverse biased. In an alternative arrangement (Fig. 2, not shown), a transistor (T3) is connected between the resistor R2, point A and the supply +U and is arranged to conduct so as to reverse bias the diode D3 during normal oscillation of the multivibrator.
GB33002/66A 1965-07-23 1966-07-22 Improvements in or relating to astable multivibrators Expired GB1147219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0098380 1965-07-23

Publications (1)

Publication Number Publication Date
GB1147219A true GB1147219A (en) 1969-04-02

Family

ID=7521425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33002/66A Expired GB1147219A (en) 1965-07-23 1966-07-22 Improvements in or relating to astable multivibrators

Country Status (8)

Country Link
BE (1) BE684558A (en)
CH (1) CH455874A (en)
DE (1) DE1252735B (en)
DK (1) DK112452B (en)
FR (1) FR1487602A (en)
GB (1) GB1147219A (en)
NL (1) NL148757B (en)
SE (1) SE340818B (en)

Also Published As

Publication number Publication date
DK112452B (en) 1968-12-16
CH455874A (en) 1968-05-15
BE684558A (en) 1967-01-25
NL6609868A (en) 1967-01-24
FR1487602A (en) 1967-07-07
DE1252735B (en)
SE340818B (en) 1971-12-06
NL148757B (en) 1976-02-16

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