Explanation Given: The circuit diagram is shown below. The transistor parameters are β = 100 V A = ∞ Calculation: The small signal model of the above transistor circuit is shown below. The small signal resistance for the given transistor circuit is calculated as shown below. r π 1 = β V T I C 1 I C 1 = I B 2 I B 2 = I Q β I B 2 = 0.5 100 mA I B 2 = 5 μA I C 1 = 5 μA r π 1 = 100 × 26 × 10 − 3 5 × 10 − 6 Ω r π 1 = 520 k Ω r π 2 = β V T I C 2 I C 2 = I Q r π 2 = 100 × 26 × 10 − 3 0.5 × 10 − 3 Ω r π 2 = 5.2 k Ω The input resistance is, R i = r π 1 + ( 1 + β ) r π 2 R i = 520 + ( 1 + 100 ) × 5.2 k Ω R i = 1.045 M Ω The output resistance is, r π 3 = β V T I C 3 r π 3 = 100 × 26 × 10 − 3 1 × 10 − 3 Ω r π 3 = 2.6 k Ω R o = 5 k | | ( r π 3 + 50 k ) β + 1 Ω R o = 5 | | ( 2.6 + 50 ) 100 + 1 k Ω R o = 5 | | 0.52079 k Ω R o = 0.472 k Ω On applying Nodal analysis at node 1, v π 2 r π 2 + v π 2 − v i n r π 1 − g m 1 v π 1 = 0 v π 2 r π 2 + v π 2 − v i n r π 1 − g m 1 ( v i n − v π 2 ) = 0 v π 2 ( 1 r π 2 + 1 r π 1 + g m 1 ) = v i n ( 1 r π 1 + g m 1 ) v π 2 ( ( β + 1 ) r π 2 + r π 1 r π 2 r π 1 ) = v i n ( β + 1 r π 1 ) v π 2 = { ( β + 1 ) r π 2 ( β + 1 ) r π 2 + r π 1 } v i n v π 2 = { ( 100 + 1 ) × 5

Microelectronics: Circuit Analysis and Design

4th Edition

ISBN: 9780073380643

Author: Donald A. Neamen

Publisher: McGraw-Hill Companies, The

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Chapter 11, Problem 11.87P

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The values of input resistance, output resistance and small signal voltage gain for the given transistor circuit.

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Chapter 11, Problem 11.86P

Chapter 11, Problem 11.88P

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For the circuit shown in Figure (1). Solve the following: ( A. What type of logic does it represent? C. Explain the function of D1. B. What type of logic family does it belong to? D. Explain the importance of DL. E. How many stages it has? Explain the function of each one. F. Construct the truth table and explain it briefly. G.How can you convert this circuit to an open collector form? Explain and sketch it. H.How can you convert this circuit to a tri-state form? Explain and sketch it. I. How can you prevent the transistors from being saturated? J. Which transistor should be modified to convert this circuit to a 4-inputs NAND? Explain and sketch it. K.Convert this circuit to a 2-inputs NOR gate and draw it. R-1200 R-4.2K R-1.5K R-IK Figure (1) lour e Your

E. How many stages it has? Explain the function of each one. F. Construct the truth table and explain it briefly. G.How can you convert this circuit to an open collector form? Explain and sketch it. H.How can you convert this circuit to a tri-state form? Explain and sketch it. I. How can you prevent the transistors from being saturated? J. Which transistor should be modified to convert this circuit to a 4-inputs NAND? Explain and sketch it. K.Convert this circuit to a 2-inputs NOR gate and draw it. R-4.2K W R-1200 R-1.5K R-IK Figure (1) JOUT e Your

Chapter 11 Solutions

Microelectronics: Circuit Analysis and Design

Ch. 11 - The circuit parameters for the differential...Ch. 11 - Consider the de transfer characteristics shown in...Ch. 11 - Prob. 11.1CSP Ch. 11 - Consider the diff-amp described in Example 11.3 ....Ch. 11 - Prob. 11.4EP Ch. 11 - Prob. 11.1TYU Ch. 11 - Prob. 11.2TYU Ch. 11 - Assume the differential-mode gain of a diff-amp is...Ch. 11 - Prob. 11.5EP Ch. 11 - Consider the diff-amp shown in Figure 11.15 ....

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