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Transcript 
Educational program: Mechanic - electrician
Title of program: Technical training
II. class
Bistable multivibrator
Worked out: Bc. Chumchal Miroslav
Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002
je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
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Scheme of bistable multivibrator
Components specification
Recessing drawing
Recessing drawing from the side of joints
Function of connection
Students activities
Components
Value
R1
1K
R2
M1
R3
M1
R4
1K
T1, T2
KF 507
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The bistable multivibrator has got two stable states. With help of input
impulse it switched over oneself between these states.
After connected of voltage the T1, T2, started to open. The faster transistor
opened oneself sooner (T1), the voltage decrease on his collector. This
voltage across Rb2 on base T2, which closed oneself. It goes about first
stable state. T1 opened, T2 closed.
Change of state came by bringing of impulse on input 2. T2 opened oneself,
the voltage decrease on collector T2, which across Rb1 bringing oneself on
baseT1. It closed oneself and it goes about second stable state. T1 is
closed and T2 is opened. We reached the change by bringing of impulse on
T1 again.
RS circuits – realization make oneself with help of two-stage gates NAND
type.
Input R – Reset. Bringing of log.1 on this input, cleared value on output Q.
(set up output on value log. 0)
Input S – Set. Bringing of log.1 on this input, it set up value Q on log. 1
If it on R and S log.1, at the same time, we marked this state as forbidden.
This state is not defined and if this state came up, it is not able to
determined the state of output.
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Explain function of the bistable multivibrator.
How different are multivibrator, astable and monostable flip-flop circuit?
Where we can use this multivibrator in practice?
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Build up the multivibrator on cuprextit desk.
Measure voltage on electrodes of both transistors T1and T2.
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Vlastní poznámkový sešit
www.wikipedie.org./wiki/klopný obvod
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