Chapter Questions
What is the absolute value of $+3 \mathrm{~V}$ and $-3 \mathrm{~V}$ ?
If the peak value of $E_i=0.5 \mathrm{~V}$ in Fig. 7-1, sketch the waveshapes of $V_o$ vs. $t$ and $V_o$ vs. $E_i$ for both a silicon and an ideal diode.
If $E_i$ is a sine wave with a peak value of $1 \mathrm{~V}$ in Figs. 7-2 and 7-3, sketch the waveshapes of $V_o$ vs. $t$ and $V_o$ vs. $E_i$.
If diodes $D_1$ and $D_2$ are reversed in Fig. 7-2, sketch $V_o$ vs. $E_i$ and $V_o$ vs. $t$.
Sketch the circuit for a signal polarity separator.
Let both diodes be reversed in Fig. 7-8. What is the value of $V_o$ if $E_i=+1 \mathrm{~V}$ or $E_i=-1 \mathrm{~V}$ ?
What is the name of a circuit that follows the voltage peaks of a signal and stores the highest value?
How do you reset the hold capacitor's voltage to zero in a peak follower-and-hold circuit?
How do you convert the absolute-value amplifier of Fig. 7-13 to an ac-to-dc converter?
If resistor $m R$ is changed to $50 \mathrm{k} \Omega$ in Example 7-1, find (a) $V_{\text {ref }}$ (b) $V_{O A}$ when $E_i=10 \mathrm{~V}$; (c) $V_{O B}$ when $E_i=10 \mathrm{~V}$.
If resistor $R_C$ is removed in Fig. 7-18, sketch $V_o$ vs. $E_i$.