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CACD Group updated 2000.12.08 Author Janez Puhan |
Astable MultivibratorsThe astable or free running multivibrator has no stable operating point. It is used for generating a steady stream of stimulus waveforms. Amplifiers with positive feedback are necessary to excite and maintain the continuous oscillations. In contrast to the oscillator described in Sine Wave Oscillator With CMOS Inverter case, which has an LC resonant circuit, capacitors and resistors are inserted in the feedback loop to define the frequency of oscillation. Two practical circuits are shown. The first one contains bipolar transistors in a symmetrical arrangement, While the second one contains CMOS inverters. The circuit 1
The input file 1
The results 1
The circuit 2
The input file 2
The results 2
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