Q. How can a monostable multivibrator be modified into a linear ramp generator?

A
Connect a constant current source to trigger input
B
Connect a constant current source to trigger output
C
Replace resistor by constant current source
D
Replace capacitor by constant current source
Solution:

The resistor R of the monostable circuit is replaced by a constant current source. So, that the capacitor is charged linearly and generates ramp signal.

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