Posted on Feb 5, 2014

When the input goes from low to high, a narrow positive pulse is generated at point A. This pulse becomes - 13 V at point B, which cuts off D2. ICC`s V+ voltage becomes zero. The charge on C1 will be absorbed by ICC on in a short time. The time constant of C2 and R5 determines the discharge period-about 10 ps. ICB is a buffer whose gain is equal t

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o (R8+R9)G·R9-1. 545. ICD`s average votiage will be (1362fx1. 545)G·2=1052t. R10 and C3 smooth the sawtooth waveform to a dc output.

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