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Electronic
Electronics: A Systems Approach
142 SOLVED PROBLEMS
Question: 19.4
Determine the small-signal behaviour of the following feedback circuit. ...
Verified Answer:
This circuit is identical to that in Example 19.3,...
Question: 19.2
Determine the small-signal voltage gain, input resistance and output resistance of the following circuit, given that hfe = 100 and hoe = 10 μS. ...
Verified Answer:
The first step in this problem is to determine the...
Question: 18.6
For the circuit in Example 18.5, compare the values obtained for the gain of the circuit when using the expressions of Equations 18.7, 18.8 and 18.9, assuming that gm = 72 mS and rd = 50 kΩ. ...
Verified Answer:
From Equation 18.7 we have
\frac{v_{o}}{v_...
Question: 18.5
Estimate the input resistance, output resistance, small-signal voltage gain and lower cut-off frequency of the following circuit, given that gm = 72 mS. ...
Verified Answer:
Much of the analysis is similar to that of earlier...
Question: 17.3
Design a voltage reference of 3.6 V capable of driving a load of 200 Ω. The reference voltage is to be produced from a supply voltage that can vary between 4.5 and 5.5 V. ...
Verified Answer:
A suitable circuit would be as shown here. Clearly...
Question: 17.2
Repeat the investigation of Example 17.1 using a simplified model of the diode. ...
Verified Answer:
We have looked at three simplified models for the ...
Question: 16.7
Determine the input and output resistance of the following circuit, assuming that the operational amplifier is a 741. ...
Verified Answer:
From the material in Section 16.4.1, we know that ...
Question: 16.2
Design an inverting amplifier with a gain of -25 based on an operational amplifier. ...
Verified Answer:
We start with our standard circuit. From Equation ...
Question: 16.1
Design a non-inverting amplifier with a gain of 25 based on an operational amplifier. ...
Verified Answer:
We start with our standard circuit. From Equation ...
Question: 14.5
Calculate the power gain of the circuit in Example 14.1. ...
Verified Answer:
To determine the power gain, first we need to calc...
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