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 7, Problem 7.33P
(a).
To determine
To verify: The values of
(b).
To determine
The values of
(c).
To determine
To draw: The small signal equivalent circuit.
(d).
To determine
The values of
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For the circuit shown in Fig. P7.53. draw a complete small-signal equivalent circuit utilizing an appropriate T model for the BJT (use alpha= 0.99). Neglect the transistor output resistance r0. Your circuit should show the values of all components, including the model parameters. What is the input resistance Rin? Calculate the overall voltage gain (vo/vsig).
When solving in AC Analysis, a negative sign in the voltage or current gain means that the output is?
What affects the stability aof a BJT Circuit?
Connect the elements given below as a BJT amplifier circuit with common emitter. BJT is BC547B terminals from left to right are named collector, base and emitter respectively. 9V battery as VCC source will be used. The audio signal obtained from the microphone will be connected to the circuit as the input signal. C0 at the outlet, CI at the inlet, CE is given as a bypass capacitor.
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Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
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- Draw the small signal model of the circuit below and write an equation for Avarrow_forwardIn order to express the effect of the internal capacitors of BJT and the high frequency reception, the current gain expression depending on the frequency (Figure b) (hfe) is used in the case of collector emitter short circuit, voltage source connected at base end and emitter grounded (Figure la).. The catalog information of the 2N2222 transistor is given in Figure Ic. In the catalogue, when Ic=20 mA, it is seen as fT=250 MHz. a) Find the total capacitor effect for the case where gm> > wCμ. (Cpi) + (Cμ) = ?pFarrow_forwardThe operating environment temperature of the base polarized circuit varies between 25 ᶛC and 50 ᶛC.The β value of the transistor is 100 at 25 ᶛC and 150 at 50 ᶛC. Under these conditions, the transistor QAnalyze the behavior (Ic and VCE) in the operating zone and determine the effect of temperature on the circuit.EXPLAIN.arrow_forward
- If the frequency that is injected into an AM modulator is 100Mhz and it is combined with another injected signal of 10Khz, we can say that the combination is:arrow_forward(a) Create a Thévenin equivalent circuit for the midband region of the common-base amplifier shown. (b) Use the model to calculate the voltage gain with the 100Ωk load attached to the amplifier.arrow_forwardConnect the elements given below as a BJT amplifier circuit with common emitter. BJT is BC547Bterminals from left to right are named collector, base and emitter respectively. 9V battery as VCC sourcewill be used. The audio signal obtained from the microphone will be connected to the circuit as the input signal. C0 at the outlet, CI at the inlet,CE is given as a bypass capacitor.arrow_forward
- BJT Emitter Follower: Draw the small-signal model for the common-collector amplifier shown below. Derive an expression for the small-signal voltage gain (A= Vo /Vi). Based on your answer for A, can you explain why this circuit is often referred to as an emitter-follarrow_forwardFor the follower circuit in Fig. P7.137, let transistor Q1 have β = 50 and transistor 2 have β = 100, and neglect the effect of ro. Use VBE = 0.7V (a) Find the dc emitter currents of Q1 and Q2. Also, find the dc voltages VB1 and VB2.(b) If a load resistance RL = 1 kΩ is connected to the output terminal, find the voltage gain from the base to the emitter of Q2, , vo/vb2, and find the input resistance Rib2 looking into the base of Q2. (Hint: Consider Q2 as an emitter follower fed by a voltage Vb2 at its base).(c) Replacing Q2 with its input resistance Rib2 found in (b), analyze the circuit of emitter follower Q1 to determine its input resistance Rin, and the gain from its base to its emitter, ve1/vb1(d) If the circuit is fed with a source having a 100 kΩ resistance, find the transmission to the base of Q1, Vb1/Vsig(e) Find the overall voltage gain Vo/Vsigarrow_forwardConfused about the gain a transistor amplifier could have. 1) can a bjt amplifier have a fixed gain, or will the gain always be dependent on the input to the circuit? 2) Please explain the difference between the DC and AC load line and which one to consider in designing the amplifier to have a maximum output swing without distortion. (The AC input is considered for this problem). Moreover, how will I determine the maximum input also not to have any distortion? 3)Please give an example in which a bjt transistor can have maximum output swing (AC and DC analysis). The resistors in the figure could be changed to bias the circuit wherein it will have maximum output swing, and assume that VCC is 5 volts. Also, give an example with an input signal (set amplitude to any value) and what its amplified output will be. Please give detailed explanation to these questions, showing equations will also be helpful. thank youarrow_forward
- A C-S amplifier is operating from a single 18-V supply. The MOSFET has Kn = 1 mA/V2. What is the Q-point current required for a voltage gain of 30?arrow_forwardDraw the small signal model of cascode amplifier and derive the expression for output impedance (λ ≠ 0), clearly showing all steps of derivation.arrow_forwardDraw the small signal model of cascode amplifier and derive the expression for input impedance (λ ≠ 0), clearly showing all steps of derivationarrow_forward
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