Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 2.2, Problem D2.4E
To determine
The values of resistances
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Problem 2: Class E Amplifier Design
A schematic of class E amplifier is shown in the figure 2 given below
For optimum operation with 50% duty cycle and when the loaded quality factor QL of
series fundamentally tuned resonant R-Lo-Co circuit is infinite to provide pure sinusoidal
current flowing into load R
a) What are the nominal voltage conditions across the switch that a class E
amplifier has to satisfy
b) In such conditions give the expression of i(t) and v(t) at the drain source
junction
c) For these waveforms, demonstrate that
the loading RLC network must
verify
L = 1.1525
R = 0.5768 dd
P
C = 0.1836-
OR
d) What is the value of the optimum phase angle seen by the switch at the
fundamental frequency?
RFC
L
Lo
Co
Io
ic
iR
Vu
R
Figure 2
e) Using the I/V curves of the transistor given in problem 1 along with its output
parasitics, and having an input impedance of 10-15j at 1 GHz, design a class
E amplifier for a nominal frequency of 1 GHz biased in class B mode using
lumped elements…
In the difference amplifier circuit given in the figure, R1 = 8kQ, R2 = 80kQ,R3=4kQ, and R4 is given as 40kQ.
a) vo output voltagevo and vi2 as appropriate for you.
b) Find the value of the output voltage v0 for vı₁ = 4V and vı2 = 7V.
Design an inverting amplifier with equivalent input resistance of Ri kΩ and gain Gspecified in Table 2.
1) Draw the circuit diagram of the amplifier, clearly naming components in the circuit.
2) Determine the component values. Use the component names that correctlycorrespond to those in your circuit diagram.
Chapter 2 Solutions
Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
Ch. 2.1 - Prob. 2.1ECh. 2.1 - Prob. 2.2ECh. 2.1 - Prob. 2.3ECh. 2.2 - Prob. D2.4ECh. 2.2 - Prob. 2.5ECh. 2.2 - Prob. 2.6ECh. 2.2 - Prob. D2.7ECh. 2.2 - Prob. D2.8ECh. 2.3 - Prob. 2.9ECh. 2.3 - Prob. 2.10E
Ch. 2.3 - Prob. D2.11ECh. 2.3 - Prob. 2.12ECh. 2.3 - Prob. 2.13ECh. 2.3 - Prob. 2.14ECh. 2.4 - Prob. 2.15ECh. 2.4 - Prob. D2.16ECh. 2.4 - Prob. 2.17ECh. 2.5 - Prob. 2.18ECh. 2.5 - Prob. D2.19ECh. 2.5 - Prob. D2.20ECh. 2.6 - Prob. 2.21ECh. 2.6 - Prob. 2.22ECh. 2.6 - Prob. 2.23ECh. 2.6 - Prob. 2.24ECh. 2.6 - Prob. 2.25ECh. 2.7 - Prob. 2.26ECh. 2.7 - Prob. 2.27ECh. 2.7 - Prob. 2.28ECh. 2.8 - Prob. 2.29ECh. 2.8 - Prob. 2.30ECh. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Prob. 2.4PCh. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10PCh. 2 - Prob. 2.11PCh. 2 - Prob. D2.12PCh. 2 - Prob. D2.13PCh. 2 - Prob. D2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. D2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. D2.26PCh. 2 - Prob. 2.27PCh. 2 - Prob. 2.28PCh. 2 - Prob. D2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - Prob. D2.33PCh. 2 - Prob. D2.34PCh. 2 - Prob. D2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. D2.37PCh. 2 - Prob. D2.38PCh. 2 - Prob. D2.39PCh. 2 - Prob. D2.40PCh. 2 - Prob. D2.41PCh. 2 - Prob. D2.42PCh. 2 - Prob. 2.43PCh. 2 - Prob. D2.44PCh. 2 - Prob. D2.45PCh. 2 - Prob. D2.46PCh. 2 - Prob. D2.47PCh. 2 - Prob. D2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. D2.51PCh. 2 - Prob. D2.52PCh. 2 - Prob. 2.53PCh. 2 - Prob. 2.54PCh. 2 - Prob. 2.55PCh. 2 - Prob. D2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58PCh. 2 - Prob. 2.59PCh. 2 - Prob. 2.60PCh. 2 - Prob. D2.61PCh. 2 - Prob. 2.62PCh. 2 - Prob. 2.63PCh. 2 - Prob. 2.64PCh. 2 - Prob. 2.65PCh. 2 - Prob. 2.66PCh. 2 - Prob. D2.67PCh. 2 - Prob. 2.68PCh. 2 - Prob. D2.69PCh. 2 - Prob. 2.70PCh. 2 - Prob. D2.71PCh. 2 - Prob. 2.72PCh. 2 - Prob. 2.73PCh. 2 - Prob. 2.74PCh. 2 - Prob. 2.75PCh. 2 - Prob. D2.76PCh. 2 - Prob. 2.77PCh. 2 - Prob. 2.78PCh. 2 - Prob. 2.79PCh. 2 - Prob. D2.80PCh. 2 - Prob. 2.81PCh. 2 - Prob. D2.82PCh. 2 - Prob. D2.83PCh. 2 - Prob. 2.84PCh. 2 - Prob. 2.85PCh. 2 - Prob. D2.86PCh. 2 - Prob. 2.87PCh. 2 - Prob. 2.88PCh. 2 - Prob. 2.89PCh. 2 - Prob. 2.90PCh. 2 - Prob. 2.91PCh. 2 - Prob. D2.92PCh. 2 - Prob. D2.93PCh. 2 - Prob. 2.94PCh. 2 - Prob. 2.95PCh. 2 - Prob. 2.96PCh. 2 - Prob. 2.97PCh. 2 - Prob. 2.98PCh. 2 - Prob. D2.99PCh. 2 - Prob. D2.100PCh. 2 - Prob. 2.101PCh. 2 - Prob. 2.102PCh. 2 - Prob. 2.103PCh. 2 - Prob. 2.104PCh. 2 - Prob. 2.105PCh. 2 - Prob. 2.106PCh. 2 - Prob. 2.107PCh. 2 - Prob. 2.108PCh. 2 - Prob. 2.109PCh. 2 - Prob. 2.110PCh. 2 - Prob. 2.111PCh. 2 - Prob. 2.112PCh. 2 - Prob. 2.113PCh. 2 - Prob. 2.114PCh. 2 - Prob. 2.115PCh. 2 - Prob. D2.116PCh. 2 - Prob. D2.117PCh. 2 - Prob. D2.118PCh. 2 - Prob. 2.119PCh. 2 - Prob. 2.120PCh. 2 - Prob. 2.121PCh. 2 - Prob. 2.122PCh. 2 - Prob. 2.123PCh. 2 - Prob. 2.124PCh. 2 - Prob. 2.125PCh. 2 - Prob. 2.126PCh. 2 - Prob. D2.127P
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- 1. Assume that the gm of Q, is 1500 umhos for the amplifier in the following figure. a. Compute. b. If gm = 1500 umho, what is the voltage gain? What is You? d. What is the purpose of C₂? What happens if it is open? C. V 200 mV pp 10 kHz HI 0.1 μF WI Ra 1.0 MO +VDD +15 V RD 6.2 k0 C3 -EE -15 V 9₂₁ 2N5458 l₂ 2N3904 RE 15 ΚΩ 0.1 μF 22 μFarrow_forward2. Design using summing amplifier so that 3V, 2V are given as input voltages and 15 V is obtained at the output. Only one amplifier is allowed to be used. i) Select the resistances accordingly and draw the circuit designing with the mentioned specifications. ii) Explain and show all calculations.arrow_forwardO 2.5 A In Passive Amplifiers, the output power can exceed the input power. Select one: O a. True O b. False An amplifier has a voltage gain of 10, an input resistance of 1M ohm and an output resis connected to a sensor that produces a voltage of 1V and has an output resistance of 1k be the output voltage of the amplifier (that is, the voltage across the load resistance) ? Anphicr Load Source R. 1k0 R 102 S0 $2arrow_forward
- 4. A common-source amplifier is based by R₁ and R₂ as shown below. Assume VTHN= |VTHP|= 0.6 V, AN=2p= 0.05 V-¹, and unCox= 200 μA/V² and upCox= 100 μA/V² (a) Assume Ibias = 0.1 mA. Determine R₁ and R₂ to set Vx as 1 V. Also, determine the drain current ID. Neglect channel-length modulation in the calculation. (b) Based on the obtained Ip in (a). Design Rp to achieve the maximum allow gain of this amplifier. Also, determine the small-signal gain Vout/Vin under this condition. (c) If RD is replaced by a PMOS (W/L= 400) as an active load (biased in the saturation region), plot the small-signal model and determine the small-signal gain of the amplifier. Assume ID is kept the same as in (a). How about if the PMOS is replaced by an idea current source of ID? Determine the small-signal gain under this condition. VDD= 2.5 V Vin R₁ bias R₂ RD VX|| ID out W/L= 200 R₁ Ibias Vino R₂ VDD= 2.5 V m voll _% W/L= 400 Vout W/L= 200arrow_forward29 Design a circuit based on the topology of the non-inverting amplifier, using only 10ks resistors, with a gain of 1.5 V/V. Note that there are two possibilities. Which of these can be easily converted to have a gain of 1.0 or 2.0 simply by short circuiting a single resistor in each case? Draw both designs, indicate which one can be switched to lx or 2x by shorting a resistor, and explain which resistor.arrow_forwardProve mathematically in details that the maximum efficiency of series - fed class A amplifier is 25 % while for class B amplifier reach up to ? 78.5 %arrow_forward
- Suppose we have a resistive load that varies from 5 kΩ to 10 kΩ .We connect this load to an amplifier, and we need the voltage across the load to vary by less than 1 percent with variations in the load resistance. What parameter of the amplifier is important in this situation? What range of values is allowed for the parameter?arrow_forwardQuestion-9 The figure below shows two stages of JFET amplifier. The first stage has Ip = 2.15 mA and the second stage has In = 9.15 mA. a- Find the d.c. voltage of drain and source of each stage w.r.t. ground. +VDn = 30 V 8.2 ka 2 kn 2.15 mA 9.15 mA D OUTPUT SIGNAL 10 MO 10 M2 6800 220n wwarrow_forwardThe resistors in the difference amplifier shown are slightly mismatched due to their tolerances. (a) What is the amplifier output voltage if v1 = 3.90 V and v2 = 4.10 V? (b) What would be the output voltage if the resistor pairs were matched? (c) What is the error in amplifying (v1 −v2)?arrow_forward
- A class B push-pull amplifier with transformer coupled load uses two transistors rated 10 W each. What is the maximum power output one can obtain at the load from the circuit?arrow_forwardQI Given the BJT amplifier circuit below and B-100 and early voltage V₁= 50 V, calculate the following showing all the details: a. Input resistance of the amplifier (with and without R₂) b. Output resistance (with and without R₁) c. Voltage gain v./v d. Voltage gain v./vi Ris www 1 ΚΩ CC1 HH 50 ΚΩ www 10 ΚΩ Vi RB 2 mA V.cc Rc -VEE Ccz 1 kn www R₁ = CEarrow_forward2. For the non-inverting amplifier shown in the figure below, calculate the output voltage (V.) V. o (0.8V) V. R,=10KQ R,=20KQ R = 2KQarrow_forward
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