Shown in Fig. P2.56 is a current sink that could be used to provide the emitter bias for the npn BJT amplifi ers discussed in Sections 8 and 9, here referred to simply as load (LD). The circuit is the...

Shown in Fig. P2.56 is a current sink that could be used to provide the emitter bias for the npn BJT amplifi ers discussed in Sections 8 and 9, here referred to simply as load (LD). The circuit is the npn counterpart of the pnp version of Fig. 2.46a, except for the use of a Zener diode to stabilize the circuit against possible variations in the supply voltage VEE. Its output current is IO 5 F(VZ 2 VBE(on))yR2. (a) Let VEE 5 212 V, and let the diode be a 5.6-V Zener diode with rz 5 15 V. Assuming the BJT has F 5 100 and VA 5 75 V, specify standard 5% values for R1 and R2 to give IO 5 2 mA and IZ 5 3 mA. (b) Hence, fi nd the Load Regulation DIOyDVL and the Line Regulation DIOyDVEE of your circuit.