Add-on triggered sweep
Description: The circuit's input operational amplifier triggers the timer, setting its flip-flop and cutting off its discharge transistor so that capacitor C can charge. When the capacitor voltage reaches the timer's control voltage (0.3Vcc), the flip-flop resets, and the transistor conducts, discharging the capacitor.
The described circuit utilizes an operational amplifier (op-amp) to control a timer, which is typically configured as a monostable multivibrator or a similar timing circuit. The input op-amp monitors the voltage across capacitor C. Upon receiving a specific input signal, the op-amp output transitions, triggering the timer. This action sets the flip-flop within the timer, which in turn disables the discharge transistor, allowing capacitor C to charge.
Capacitor C charges until its voltage reaches a predetermined threshold, specifically 0.3 times the supply voltage (0.3Vcc). This threshold is significant as it determines when the timer will reset. Once the voltage across the capacitor reaches this control voltage, the flip-flop resets, changing the state of the timer. This reset action enables the discharge transistor, allowing it to conduct and discharge the stored energy in capacitor C.
The circuit's operation can be visualized in stages: Initially, the op-amp output is high, keeping the flip-flop set and the discharge transistor off. As the capacitor charges, the voltage across it increases. Once the voltage threshold is reached, the flip-flop resets, and the discharge transistor turns on, creating a path for the capacitor to discharge rapidly.
This type of circuit can be applied in various timing applications, where precise control over timing intervals is required, such as in pulse generation, delay circuits, or even in signal conditioning where timing and voltage thresholds are critical. The choice of components, including the op-amp, timer IC, and capacitor value, will influence the timing characteristics and performance of the overall circuit.The circuit"s input op amp triggers the timer, setting its flip-flop and cutting off its discharge transistor so that capacitor C can charge When the capacitor voltage reaches the timer"s control voltage (03Vcc), the flip-flop resets and the transistor conducts, discharging the capacitor.
The described circuit utilizes an operational amplifier (op-amp) to control a timer, which is typically configured as a monostable multivibrator or a similar timing circuit. The input op-amp monitors the voltage across capacitor C. Upon receiving a specific input signal, the op-amp output transitions, triggering the timer. This action sets the flip-flop within the timer, which in turn disables the discharge transistor, allowing capacitor C to charge.
Capacitor C charges until its voltage reaches a predetermined threshold, specifically 0.3 times the supply voltage (0.3Vcc). This threshold is significant as it determines when the timer will reset. Once the voltage across the capacitor reaches this control voltage, the flip-flop resets, changing the state of the timer. This reset action enables the discharge transistor, allowing it to conduct and discharge the stored energy in capacitor C.
The circuit's operation can be visualized in stages: Initially, the op-amp output is high, keeping the flip-flop set and the discharge transistor off. As the capacitor charges, the voltage across it increases. Once the voltage threshold is reached, the flip-flop resets, and the discharge transistor turns on, creating a path for the capacitor to discharge rapidly.
This type of circuit can be applied in various timing applications, where precise control over timing intervals is required, such as in pulse generation, delay circuits, or even in signal conditioning where timing and voltage thresholds are critical. The choice of components, including the op-amp, timer IC, and capacitor value, will influence the timing characteristics and performance of the overall circuit.The circuit"s input op amp triggers the timer, setting its flip-flop and cutting off its discharge transistor so that capacitor C can charge When the capacitor voltage reaches the timer"s control voltage (03Vcc), the flip-flop resets and the transistor conducts, discharging the capacitor.
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