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LINEAR_SAWTOOTH_WAVEFORM_GENERATOR_CIRCUIT

2017-03-11 09:47  
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LINEAR_SAWTOOTH_WAVEFORM_GENERATOR_CIRCUIT
In this circuit, Q1 is a constant-current source, whose output is controlled by R9. C1 charges linearly, and follower U1-a drives comparator U1-b. When the threshold set by R3 and R6 is reached, U1-b changes state and triggers pulse generator U2, gating on Q2 and discharging C1 through R8.The cycle then repeats. The period is approximately 8 x C1/I1, where I1, is the collector current of Q1, as set by R9 and the base bias on Q1.