Explanation Given: The circuit is given as: The transistor parameters are V T N = 0.8 V K n ' = 80 μA/V 2 λ 1 = λ 2 = 0 λ 3 = λ 4 = 0.01 V -1 Since, V + = 10 V V − = − 10 V A d = 100 A c m = 0.10 I Q = 0.5 mA Now select v o 1 = v o 2 = 3 V : From the above circuit: R D = V + − V O 1 I D 1 = V + − V O 1 I Q 2 = 10 − 3 0.5 × 10 − 3 2 = 7 0.25 × 10 − 3 R D = 28 kΩ Evaluating the differential gain of the diff-amp: A d = g m R D 2 2 A d = g m R D 2 × 100 = g m ( 28 × 10 3 ) g m = 2 × 100 28 × 10 3 g m = 7.14 mA/V The Transconductance is evaluated as: g m = 2 K n I D = 2 ( K n ' 2 ( W L ) ) I Q 2 7.14 × 10 − 3 = 2 ( 80 × 10 − 6 2 ( W L ) ) 0

MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)

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ISBN: 9781266368622

Author: NEAMEN

Publisher: MCG

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Chapter 11, Problem D11.45P

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To design: The required differential amplifier required for the circuit configuration and also design the sophisticated current source if the CMRR requirement is not met.

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Chapter 11, Problem D11.44P

Chapter 11, Problem 11.46P

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Figure 2 3) *** The circuit of Figure 3 is designed with W/L = 20/0.18, λ= 0, and ID = 0.25 mA. (Optional- 20 points) a) Compute the required gate bias voltage. b) With such a gate voltage, how much can W/L be increased while M1 remains in saturation? What is the maximum voltage gain that can be achieved as W/L increases? VDD = 1.8 V RD 2k - Vout Vin M₁ Figure 3

1) Rs = 4kQ, R₁ = 850 kQ, R₂ = 350 kQ, and R₁ = 4 kQ. The transistor parameters are VTP = -12 V, K'p = 40 µA / V², W/L = 80, and λ = 0.05 V-1. (50 Points) a) Determine IDQ and VSDQ. b) Find the small signal voltage gain. (Av) c) Determine the small signal circuit transconductance gain. (Ag = io/vi) d) Find the small signal output resistance. VDD = 10 V 2'; www www Figure 1 Сс

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Chapter 11 Solutions

MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)

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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To design: The required differential amplifier required for the circuit configuration and also design the sophisticated current source if the CMRR requirement is not met.

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To design: The required differential amplifier required for the circuit configuration and also design the sophisticated current source if the CMRR requirement is not met.

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Chapter 11 Solutions