By observing that the circuit of 7-51 (a) is an inverting Schmitt trigger (introduced in Problem 5.58), argue that the capacitor voltage and the op amp’s output are correctly shown in Fig. 7-51(c).

Data from Problem 5.58

The op amp of Fig. 5-30 compares the input signal v₁ with an independent reference level v₀, forcing the op amp into high saturation (if v₁ > v₀) or low saturation (if v₁ 0). Let the reference level be set up by the output of the op amp through the voltage divider R1/(R₁ + R₂) as shown in Fig. 5-62(a) with R₁ = 2R₂. Assume saturation levels of ±15. Given v₁(t) = 10(sin 20πt + sin 30πt) and v₂(0) = 15 V, sketch the output voltage v₂(t). The circuit is called an inverting Schmitt trigger.

Data from figure 5-30

Data from figure 5-62

Transcribed Image Text:

1=0 C: C= ox i V V V+ ww R₁ •M R3 Vout R₂