Chapter 2, Problem 2.66P

The parameters of $D_1$ and $D_2$ in the circuit shown in Figure P2.66 are $V_{\gamma }=1.7\text{V}$ and $r_f=20\Omega$ . The current in each diode is to be limited to $I_D=15\text{mA,}$ for $V_I=\pm 5\text{V}$ . Determine the required value of R.

Figure P2.66