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Q. 4. (a) Draw a small signal equivalent circuit by replacing the BJT with its hybrid-1...
Draw a small signal equivalent circuit by replacing the BJT with its hybrid-i model for the circuit shown below. Also derive an expression for Zin when rais neglected. + Vx
Q. 4. (a) Draw a small signal equivalent circuit by replacing the BJT with its hybrid-mt model for the circuit shown below. Also derive an expression for Zin when la is neglected. (10) + Vx (b) Compute the voltage gain, input and output impedance for the following circuit if ß = 150 and VBEQ = 0.7 V, V1 = 26 mV. (15) A+ 10 V 40 ΚΩ R1 4 ΚΩ Сі CO Vs R2 vo 60 ΚΩ 5 ΚΩ RE...
1. Problem 1: For the circuit below, where β-100 and VT 25mV a. Find the dc collector current, Ic. b. Find the small signal parameters: gm , Γπ and re- c. Draw the small-signal equivalent circuit by replacing the BJT with its hybrid-t model. d. Draw the small-signal equivalent circuit by replacing the BJT with its T model. e. Use the circuit in c or d to determine the voltage gains (Ao, A.) and overall gain (Gv) 5V 1V Vout...
7.53 For the circuit shown in Fig. P7.53, draw a complete small-signal equivalent circuit utilizing an appropriate T model for the BJT (use a =0.99). Your circuit should show the values of all components, including the model parameters. What is the input resistance R ? Calculate the overall voltage gain (v,/v). (also find A, for this amp) sig +5 V RC 12 kΩ C2 RL 12 ΚΩ Rsig 75 N ) 0.33 mA Vsig Rin Figure P7.53
P.3: (4 marks) The AC circuit for the amplifier is given below 1- Draw the AC equivalent circuit of the amplifier using the high frequency hyo model - Tt model with C, Ceo and ro taken into consideration and Cah neglected. Use the open circuit time constants method to derive an expression for G. (3 marks) ma 2- 0 Ry,
Q1(a) [5 Marks The diagram of Fig Ql(a) below describes how a Bipolar Junction Transistor (BJT) may be represented as a two-port network. With the aid of this diagram, derive expressions for the small signal parameters: hie, hoe, hre and hfe. 01- Port 1 V1 Two-Port Network V2 Port 2 Fig Ql(a) Q1(b) [25 Marks) The small signal Common-Emitter (CE) amplifier circuit of Fig Q1(b) below has the following parameters: hie = 1k22, hre = 104, hfe = 100, hoe...
2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit using the T-model without the B1 Cci output resistance (b)Find an expression for the input resistance Rin. (c)Find an expression for the output resistance Ro. (d) Find an expression for the lower cut-off frequency Vi Re sig 82 C, (RE-R) in associated with Cci. (d)Find expressions for the two gains vo/v, and v/Vsig CI. 2.34. Consider the common-emitter amplifier on the right. (a)Draw a small-signal equivalent circuit...
2.(20pts) The NFET transistor in the source-follower circuit has gm=5mA/V and 1=100k. Draw a hybrid- small-signal schematic. Derive expressions for and calculate the following: voltage gain v/v; and the output resistance Rout. Show all your work! C P +100 [104 You
6.5 BI C2 Cl sig in 0 Design the bias circuit of the CE amplifier shown to obtain IE= 0.5 mA and Vc= +6 V. Design for a dc voltage at the base of 5 V and a current through RB2 of 50 μΑ. Let Vcc-+15 V, β-100, and VBE 0.7 V. a) Specify the values of RBi, RB2, RE, and Rc b) Also give the values of the BJT small-signal parameters gm, rr , and ro at the bias...
3.(15pts) Draw ac equivalent hybrid-pi circuit (assume ro=00) and derive equation for Rout- +3V 3.3 ko DA 100 kn