A circuit as shown in Fig. 5.1 has V CC = 15V, R 1 = R 2

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A circuit as shown in Fig. 5.1 has VCC= 15V, R1= R2= 0, R3= 5k„¦, RL= 2k„¦, VCE(sat)= 0.2 V, and VBE(on)= 0.7 V. All device areas are equal.

(a). Sketch the transfer characteristic from Vi to Vo.

(b). Repeat (a) if RL = 10 k„¦.

(c). Sketch the waveform of Vo if a sinusoidal input voltage with an amplitude (zero to peak) of 10 V is applied at Vi in (a) and (b) above.

(d). Use SPICE to verify (a), (b), and (c) and also to determine second and third harmonic distortion in Vo for the conditions in (c).

Figure 5.1

+Vc_ Q1 V; I'e RL R3 Q2 Q3 R2 R1 -Vcc

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Analysis and Design of Analog Integrated Circuits

ISBN: 978-0470245996

5th edition

Authors: Paul R. Gray, ‎ Paul J. Hurst Stephen H. Lewis, ‎ Robert G. Meyer

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