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Buffer
A buffer is a logic circuit that amplifies the current or power. Basically it is used change the driving capability of a logical circuit. Therefore it is sometimes referred as drive. A simple buffer and tri state buffers (active high and active and low ) are shown in figure.
A tri state buffer if enabled provided the same logic level of the output as that of input i ,e if input is at logic 1 then it provides logic 1 output.
Notations that are used in transistor circuits:- h ie = h 11e = Short circuit input impedance h 0e = h 22e = Open circuit output admittance
Draw a logic diagram to implement F=ABCDE using only 3 input AND gates
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UJT as relaxation oscillator: The UJT relaxation oscillator is shown in fig. it consist of a UJT and a capacitor C which is charged through a variable resistance R when VBB is
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What is current electricity
POP PSW Instruction It is similar to above pop instruction but instead of normal register pairs it uses PSW as its operand. Program status word comprises of the content
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