Chapter 15, Problem 15.8TYU

For the Schmitt trigger in Figure 15.30(a), the parameters are: $V_{\text{REF}}=2\text{V}$ , $V_H=10\text{V}$ , $V_L=-10\text{V}$ , $R_1=1\text{k}\Omega$ ,and $R_2=10\text{k}\Omega$ :(a)Determine $V_S,V_{TH}$ ,and $V_{TL}$ . (b) Let ${\upsilon }_I$ be a triangular wave with a zero average voltage, a 10V peak amplitude, and a 10 ms period. Sketch ${\upsilon }_O$ versus time over two periods. Label the appropriate voltages and times. (Ans. (a) $V_S=1.82\text{V}$ , $V_{TH}=2.73\text{V}$ , $V_{TL}=0.91\text{V}$ )