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# exp_pre7 - HACETTEPE UNIVERSITY DEPARTMENT OF ELECTRICAL...

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HACETTEPE UNIVERSITY DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELE-314 ELECTRONICS LABORATORY III EXPERIMENT 7 IC MONOSTABLE, ASTABLE MULTIVIBRATORS AND FREQUENCY DOUBLER 1. PURPOSE : Investigation of the integrated circuit monostable, astable multivibrators and frequency doubler circuits. 2. THEORY : Given in lecture notes. 3. PRELIMINARY WORK : 3.1. In the circuit shown in Figure-1, R = 15 K , C = 100 nF, the threshold voltage V TH = 1.5 volts, and the supply voltage V DD = 5 volts. Find and sketch the waveforms of V 1 , V 2 , and V 3 . V 1 V 2 V 3 R C Figure 1 3.2. (a) Find and sketch the waveforms V 1 and V 2 of the Schmitt trigger astable multivibrator shown in Figure-2, where the Schmitt trigger NAND gate characteristics is also given. The values are V C = V DD = 5V., C = 100 nF, R = 15 K . (b) Repeat part (a) for R = 47 K . Explain the function of V C .

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V 1 V 2 C R V C V in VV DD C = V o 5 2.3 2.9 V in (volts) V o (volts) Figure 2 3.3. Find and sketch V 1 and V 2 in Figure-3, if V CC = 5V , R A = 5.6 K , C = 100 nF, C ' = 10 nF and V in is a 1 kHz square wave.
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exp_pre7 - HACETTEPE UNIVERSITY DEPARTMENT OF ELECTRICAL...

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