Microelectronic Circuits (the Oxford Series In Electrical And Computer Engineering)
8th Edition
ISBN: 9780190853464
Author: Adel S. Sedra, Kenneth C. (kc) Smith, Tony Chan Carusone, Vincent Gaudet
Publisher: Oxford University Press
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Chapter 1, Problem D1.81P
To determine
To show: The given constraints can be met if the following selections are used.
To find: The value of Ri ,
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1- a) Draw the circuit of a V-I converter and derive an expression for the output current in terms of input voltage. b) Draw the neat diagram of analog multiplier using log-antilog amplifiers and explain its operation
Figure QI shows the circuit diagram of a "Logarithmic Amplifier". In this
circuit the feedback resistor of a normal inverting amplifier is replaced by a
silicon diode. Since the current flowing through the diode increases
exponentially with the voltage across the diode, the voltage across the diode
will be proportional to the logarithm current flowing through it. Hence the
output of the circuit is proportional to the logarithm of the input voltage.
QI
DI
RIN
Al
Figure QI
The current flowing through a diode is given by the Shock' y Diode Equat n:
1,=1, (e" =1)
where
, is the current flowing through the diode
g is the charge on the electron (given at the back of the examination sheet)
V, is the voltage across the diode
K, is Boltzmann's constant (given at the back of the examination sheet)
Tis room temperature (given at the back of the examination sheet)
Given that /,> 1, an approximate expression for V, as a function of I, is
Continued overleaf
Page 2 of 9
QI (a) 0)
Neglecting any input…
Design a multi-stage amplifier using the specifications below. After the necessary calculations are performed, simulate the circuit in Multisim and make any corrections/changes to the circuit, as necessary.
Part I: Amplifier Specifications.
• Use no more than three 2N3904 transistors.
• The overall amplifier gain should be at least Av = +50
• Input signal should be at
• Your circuit load
• The input resistance,
• The output resistance, .
• VCC ≤ 20 volts
• The output voltage, Vout is not inverted from the input voltage, Vin.
Chapter 1 Solutions
Microelectronic Circuits (the Oxford Series In Electrical And Computer Engineering)
Ch. 1.1 - Prob. 1.1ECh. 1.1 - Prob. 1.2ECh. 1.1 - Prob. 1.3ECh. 1.1 - Prob. 1.4ECh. 1.2 - Prob. 1.5ECh. 1.2 - Prob. 1.6ECh. 1.2 - Prob. 1.7ECh. 1.2 - Prob. 1.8ECh. 1.3 - Prob. 1.9ECh. 1.4 - Prob. 1.10E
Ch. 1.4 - Prob. 1.11ECh. 1.5 - Prob. 1.12ECh. 1.5 - Prob. 1.13ECh. 1.5 - Prob. 1.14ECh. 1.5 - Prob. 1.15ECh. 1.5 - Prob. 1.16ECh. 1.5 - Prob. 1.17ECh. 1.5 - Prob. 1.18ECh. 1.5 - Prob. 1.19ECh. 1.5 - Prob. 1.20ECh. 1.5 - Prob. 1.21ECh. 1.6 - Prob. 1.22ECh. 1.6 - Prob. D1.23ECh. 1.6 - Prob. D1.24ECh. 1 - Prob. 1.1PCh. 1 - Prob. 1.2PCh. 1 - Prob. 1.3PCh. 1 - Prob. 1.4PCh. 1 - Prob. 1.5PCh. 1 - Prob. 1.6PCh. 1 - Prob. 1.7PCh. 1 - Prob. D1.8PCh. 1 - Prob. D1.9PCh. 1 - Prob. 1.10PCh. 1 - Prob. 1.11PCh. 1 - Prob. D1.12PCh. 1 - Prob. D1.13PCh. 1 - Prob. D1.14PCh. 1 - Prob. 1.15PCh. 1 - Prob. 1.16PCh. 1 - Prob. 1.17PCh. 1 - Prob. 1.18PCh. 1 - Prob. 1.19PCh. 1 - Prob. 1.20PCh. 1 - Prob. 1.21PCh. 1 - Prob. 1.22PCh. 1 - Prob. 1.23PCh. 1 - Prob. 1.24PCh. 1 - Prob. 1.25PCh. 1 - Prob. 1.26PCh. 1 - Prob. 1.27PCh. 1 - Prob. 1.28PCh. 1 - Prob. 1.29PCh. 1 - Prob. 1.30PCh. 1 - Prob. 1.31PCh. 1 - Prob. 1.32PCh. 1 - Prob. 1.33PCh. 1 - Prob. 1.34PCh. 1 - Prob. 1.35PCh. 1 - Prob. 1.36PCh. 1 - Prob. 1.37PCh. 1 - Prob. 1.38PCh. 1 - Prob. 1.39PCh. 1 - Prob. 1.40PCh. 1 - Prob. 1.41PCh. 1 - Prob. 1.42PCh. 1 - Prob. 1.43PCh. 1 - Prob. 1.44PCh. 1 - Prob. 1.45PCh. 1 - Prob. 1.46PCh. 1 - Prob. 1.47PCh. 1 - Prob. 1.48PCh. 1 - Prob. 1.49PCh. 1 - Prob. 1.50PCh. 1 - Prob. 1.51PCh. 1 - Prob. 1.52PCh. 1 - Prob. 1.53PCh. 1 - Prob. D1.54PCh. 1 - Prob. D1.55PCh. 1 - Prob. D1.56PCh. 1 - Prob. D1.57PCh. 1 - Prob. 1.58PCh. 1 - Prob. 1.59PCh. 1 - Prob. 1.60PCh. 1 - Prob. D1.61PCh. 1 - Prob. 1.62PCh. 1 - Prob. D1.63PCh. 1 - Prob. D1.64PCh. 1 - Prob. 1.65PCh. 1 - Prob. 1.66PCh. 1 - Prob. 1.67PCh. 1 - Prob. 1.68PCh. 1 - Prob. 1.69PCh. 1 - Prob. 1.70PCh. 1 - Prob. 1.71PCh. 1 - Prob. D1.72PCh. 1 - Prob. 1.75PCh. 1 - Prob. 1.76PCh. 1 - Prob. D1.77PCh. 1 - Prob. D1.78PCh. 1 - Prob. 1.79PCh. 1 - Prob. 1.80PCh. 1 - Prob. D1.81PCh. 1 - Prob. 1.82PCh. 1 - Prob. 1.83P
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