(a) For the Widlar current source shown in Figure 10.9, find
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MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)
- Consider the emitter follower in Figure 1 with VCC = 10V, I = 100 mA, and RL = 100Ω. (a) Find the power dissipated in Q1 and Q2 under quiescent conditions. (vO = 0V) (b) For a sinusoidal output voltage of maximum possible amplitude (neglecting VCEsat), find the average power dissipation in Q1 and Q2. Also find the load power.arrow_forward2. This is a small signal problem. Suppose the MOSFETS drawn have lp = 1 mA when VGS = 2.5 V, and Vth = 0.5 V. Suppose the BJTs drawn have Ic = 1 mA when VBE = 0.7 V. Av VDD = 5V VDD VDD T T Rc = 1 kn Vin RB2 = 10 kn RB1 = 10 kn w/li w Rp = 1 kn R₁ Vout (a) Derive voltage gain Ay and input impedance Zin assuming R₁ ➡8. (b) Plot Ay as a function of R, assuming R, is attached between Vout and ground. (c) Rederive Ay and Zin assuming Roo and after swapping the BJT and MOSFET. RLarrow_forward3. In the figure shown below, Vmax is measured as 5.9 V and V min measured as 1.2V. 18] In the figure shown below, is measured as 5.9 V an (a) Determine the value of V.. (b) Determine the value of Vm. (c) Determine the modulation index. (d) Suppose we can change the value of V. What is the maximum value that we could use for Vm without causing overmodulation?arrow_forward
- I. If a sinusoidal signal voltage of 6V ( pp ) is applied to each amplifier in the figure below , what are their output voltages ( draw ) and what is their phase relationship with respect to the inputs ?arrow_forwardDesign a common-emitter amplifier to provide a small-signal voltage gain of approximately -10. 1. Consider the circuit shown in Figure 1. Show the following calculations in your notebook: Calculate a value for Rc so that A, z –10 Calculate values for R1 and R2 so that the circuit is bias stable and near the center of the load line. (Note: Use the datasheet for the 2N5209 transistor to make your calculations more accurate). Vcc = 10 V R1 Rc Cc2 Cci RL Vs R, REj = 499 Q Figure 1: Common-emitter amplifier for part #1arrow_forward4. For the transistor in the figure shown below, the parameters are ß = 100 and VÀ = ∞. a. Design the circuit such that lEQ = 1mA and the Q-pt is in the center of the dc load line. b. If the peak-to-peak sinusoidal output voltage is 4V, determine the peak-to-peak sinusoidal signals at the base of the transistor and the peak-to-peak value of Vs. If the load resistor R₁ = 1kQ is connected to the output through a coupling capacitor, determine the peak-to-peak value in the output voltage, assuming vs is equal to the value determined in part (b). Vcc=+10 V www Rs = 0.7 kΩ Cc www RB RE voarrow_forward
- Sketch the circuit for a common-source amplifier such that Vgs = 2.4666 V and Id = 1.133mA. Calculate the vi/vo and voltage gain. Tech Parameters: Vtn = 1.3 V kp = 20.45 uA/V^2 W/L = 80arrow_forwardThe common-drain stage in the following figure has the following component parameters: RG = 900 K, Rs = 50 kN, R₁ = 2.5 km. For the transistor assume gm = 8 ms and (VGS - VT) = 0.7 V. Write your answer rounding to 3 significant digits. Examples: 0.357, -2.48, 13.0, -924, 3450 Vin Av = Rin = Rout= Rs www Rin type your answer... type your answer... type your answer... RG ΚΩ Ω M₁ Rout RL + Vinarrow_forwardPlease choose the correct answer. About feedback.arrow_forward
- solvearrow_forward2. The parameters of the transistor as shown in the figure below are ß = 100 and VA = 100V. a. Find the dc voltages at the base and emitter terminals. b. Find Rc such that VCEQ = 3.5V. c. Assuming Cc and CE act as short circuits, determine the small-signal voltage gain Av = Vo/Vs. d. Repeat part (c) if a 5000 source resistor is in series with the vs signal source. V+ = +5 V Rs = 100 £2 www Us Cc RB = 10 ΚΩ I= Iausmi 0.35 mA www RC -000 V=-5 V CEarrow_forwardFigure 1 shows the transfer curve of a network with an unknown channel Junction Field Effect Transistor (JFET). (i) Identify the channel of the JFET; justify your answer. (ii) Given the supply voltage of 16 ?, design a voltage divider network using the JFET in (i) above. Take R1 = 1400RS; R2 = 180RS; and VD = 10 V. Please use the nearest standard resistor values. (iii) With the obtained standard resistance values in (ii) above, determine the new IDQ and VGSQ, using the mathematical approach only.arrow_forward
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