(i) By mathematical approach, prove that the transistor Q-points, Vosq = 2.14 Vand IpQ=2.57 mA.(ii) Draw the small-signal ac equivalent circuit at middle frequency.(iii) Calculate gm, Zin and Zout(iv) Derive the equation for voltage gain, Aus=and calculate the voltage gain,Avs.(v) If Rst is short-circuited, what will be the effect towards Aus? (c) Figure Q.1 shows a MOSFET amplifier. Given that: Vos (th) 2 V, k = 130mA/V2and rasco,Vs+ VDD(+12 V)RD3 ΚΩC210 µFRsig500 ΩCI1 µFHHRG100 ΚΩwww+VGSQRSI0.6 ΚΩwwwIDQZinRS2C30.9 ΚΩ22 µFHFRL5 ΚΩZout- Vss(-6 V)Figure Q.1. MOSFET amplifier circuitVo

Step 1:(1) For the capacitor C3, since earthing is there Vgs = 2V, Idq= 2/0.9 = 200/9 mA.Now finding…

Answered: (i) By mathematical approach, prove…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Coonsider the common emitter amplifier shown in figure below. Assume a β of 100, VBE = 0.7V, VT = 25mA and VA = 100V. Draw an equivalent DC model and determine the rπ, transconductance (gm) and ro. Draw an equaivalent AC model using the small-signal model Find an expression for vbe and vo in terms of the input voltage
Q1. The output characteristic of a typical transistor is shown below, where the quiescent point is selected on it. This transistor is used in the bias circuit presented below. Find the suitable values of Rg and Rc to fix the Q-point of the circuit properly. +Vcc = 12 V 12- Is = 70 uA 10- Ig = 60 uA 8- Rc Is = 50 uA Rs 6- Ig= 40 uA 4. Is = 30 uĄ Is = 20 uA B = 100 2- VBE = 0.7 V 0- -2- 2 4 6 8 10 12 14 16 VCE (V) Ic (mA)
V* = + |ov Ri Rip ERC Vs RE V: -sV The following parameters are given for this transistor: B = 200 and VA = o. Design the circuit with the following value ICQ = 1.5mA and VCEQ = 5V. Find the small signal voltage gain AV = Vo/Vs. Find the input resistance in the signal source Vs.
What is the power gain of the amplifier circuit in the figure? For BJT: beta(F) = hFE = 100 beta(f) = hfe = 200 VBEQ = 0,6V VT = 25mV hre = hoe = 0
Derive the expression for the small signal current gain Ai = io / is
Q.) Figure below divider bras amplifier Circuit. Givent the model Parameter : gm = 5o mS emitter (CE) Voltage BJT hibrid- TT Shows a Common riT: 6 Kr and to %3D : 00 +Vc. RI C2 Tooks touf RL Vo ihe 200 RE TCE Vs 20 a Draw the Ac eQuivalent at low Freauency Circuit Zi and b.) Determine inPut impedance at mid FreaUincy OutPut imPedance Z0 c.) Calculafe two low Cut -oFF FreQuen Cies FLC1 and FLC2 Ci and E2 respectively Such as due to the exterda al capacitors
The output characteristics of a MOSFET, is a plot of O a. ld as a function of Vds with Vgs as a parameter O b. lg as a function of Vgs with Vds as a parameter Oc lg as a function of Vds with Vgs as a parameter O d. Id as a function of Vgs with Vds as a parameter The controlling parameter in MOSFET is? O a. Vds O b. 1g O c Vgs O d. is
Adiff-amp is biased with a constant-current source lo- 0.25mA that has an output resistance of R. - 8MO. The bipolar transistor parameters are B=100, VT = 0.025 V and VA -. Determine the common-mode input resistance. O a. Ricm = 538 MA O b.Ricm- 308 MO OC Ricm = 808 MO Od Ricm = 704 MQ
For the circult shown in the given figure. Rc-2.4 k0, Rg-10 ko. Pmin-50, and Vcc=5 V. Determine the range of values of Vgg 50 Ic that the transistor is in saturation. Assume Vy-0.6 V and VCEsat -0.2 V. The range of values of VB8 Is VBB> 12 V Ra VAR со Va VCE OE RC Ncc
9. State the relationships of the small signal hybrid- π parameters gm & rn to the transistor dc quiescent values. Draw the small signal model of the adjacent BJT amplifier circuit: Rs=0.5 KQ ww HH Cc Vcc= 10 V R₁ = • 56 ΚΩ www 3 R₂ = 12.2 kQ2 Rc=2kQ - VO RE=0.4 KQ
Q2: For the circuit shown in figure (2), he=100 for all transistors and 1/hobs = 200k2. Find: a. DC values for Ics, Ici. Vez, Ic7 and Vco. b. Ad, A, and CMRR of the difference amplifier. +15v 10KE 100k 1k 10k Q8 Q3 v1 Q7 25k Q1 Q2 14.3k Q5 Q6 Q9 -15v Figure (2)

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