As shown in Figure 1, the resistor R and the capacitor C are connected in series to the input signal VI, and the capacitor C outputs the signal V0. When the RC (Ï„) value and the input square wave width tW satisfy: Ï„""tW, the circuit is called For the integration circuit. The sawtooth voltage is obtained at both ends (output) of capacitor C, as shown in Figure 2.
Rc integration circuit
Sawtooth voltage at both ends of C
(3) When t=t2, VI is from Vm→0, which is equivalent to the short circuit at the input end. The capacitor is originally filled with the left positive and negative voltage VI (VI “Vm†is slowly discharged by R, and VO (VC) decreases exponentially. 4. He highlights the DC and gradual components of the input signal and reduces the amount of change in the input signal.
Thus, the output signal is a sawtooth wave, which is approximately a triangular wave. Ï„""tW is a necessary condition of this circuit, because during the arrival of the square wave, the capacitor is only slowly charged, and when the VC has not risen to Vm, the square wave disappears. The capacitor begins to discharge, so that the capacitor voltage does not have a stable voltage value, and the larger the Ï„, the closer the sawtooth wave is to the triangle wave. The output waveform is the result of integrating the input waveform
Condition of rc integration circuitThe integration condition of the RC circuit: RC ≥ Tk, Tk is the pulse period, and the integration circuit can convert the rectangular pulse wave into a sawtooth wave or a triangular wave, and can also convert the sawtooth wave into a parabolic wave.
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