Chapter 17, Problem 17.4EP

Assume the maximum currents in $Q_3$ and $Q_4$ of the ECL circuit in Figure 17.5 are to be $1.0\text{mA}$ . (a) What are the required values of $R_3$ and $R_4$ ? (b) Using the results of part (a), calculate the new power dissipated in the circuit for ${\upsilon }_X={\upsilon }_Y=-0.7\text{V}$ . (Ans. (a) $R_3=R_4=4.5\text{k}\Omega$ , (b) $P=40.8\text{mW}$ )