Repeat problem 4.1 including the effects of nonzero base currents?

Repeat problem 4.1:

Determine the output current and output resistance of the bipolar current mirror shown in Fig. 4.55. Find the output current if V_out = 1 V, 5 V, and 30 V. Ignore the effects of nonzero base currents. Compare your answer with a SPICE simulation.

Figure 4.55: Circuit for Problem 4.1

Use the high-voltage device parameters given Fig. 2.30 and Fig. 2.35, useless otherwise specified. Assume that r_b = 0 and rµ †’ ˆž in all problems. Assume all bipolar transistors operate in the forward-active region, and neglect base currents in bias calculations unless otherwise specified.

Figure 2.30: Simple two-transistor current mirrors where the input current is set by the supply voltage and a resistor using (α) bipolar and (b) MOS transistor.

Figure 2.35: Transfer characteristics of the MOS peaking current source assuming both transistors operate in weak inversion or in strong inversion.

Transcribed Image Text:

Vcc= 15 V R= 10 ka 'oUT VOUT O2 Q4 O5 Vcc VDD IIN /IN 'OUT 'OUT Q1 Q2 M1 M2 Тв1 I82 (a) (b)