Oscilloscope triggered sweep circuit

Posted on Sep 11, 2012

The circuit`s input op amp triggers the timer, sets its flip-flop and cuts off its discharge transistor so that capacitor C can charge. When capacitor voltage reaches the timer`s control voltage of 0.33 Vee. the flip-flop resets and the transistor conducts, discharging the capacitor.

Oscilloscope triggered sweep circuit
Click here to download the full size of the above Circuit.

Greater linearity can be achieved by substituting a constant-current source for frequency adjust resistor R.

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