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555 Bootstrap Pound wave Genenrator Circuit

2015-02-06 22:26  
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555 Bootstrap Pound wave Genenrator Circuit
555 Bootstrap Pound wave Genenrator Circuit
As shown in the figure 5-6, the sawtooth wave generator consists of a 555 single stable circuit and a feedback bootstrap circuit. The IC2 (LM741) operational Amplifier is used as a feedback bootstrap circuit , and the charge current of sawtooth voltage is provided by the output voltage of Pin 6 to C1 through R1, and the current size is determined by the size of the clamp of the voltage regulator tube. The control side of 555 is pin 5, which can adjust and control voltage when attached outside to change the preference voltage of comparator or the comparison level in 555, so that the cycle and amplitude of the sawtooth wave can be changed.