Concept explainers
(a)
The small-signal voltage gain for given
(a)
Answer to Problem 10.81P
Explanation of Solution
Given:
Calculation:
The given circuit is,
The transistor
Now calculate the small-signal voltage gain,
Substitute the given values,
Substitute
Conclusion:
(b)
The small-signal voltage gain for given
(b)
Answer to Problem 10.81P
Explanation of Solution
Given:
Calculation:
The given circuit is,
The transistor
Now calculate the small-signal voltage gain,
Substitute the given values,
Substitute
Conclusion:
(c)
The small-signal voltage gain for given
(c)
Answer to Problem 10.81P
Explanation of Solution
Given:
Calculation:
The given circuit is,
The transistor
Now calculate the small-signal voltage gain,
Substitute the given values,
Substitute
Conclusion:
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Chapter 10 Solutions
Microelectronics: Circuit Analysis and Design
- 3. 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_forwardFor the circuit in Figure 10.20 in the text,VCC = 5 V, RC = 1 kΩ, RB = 10 k, and βmin = 50.Find the range of values of VBB so that the transistor isin saturation.arrow_forwardVi RB Vcc Rc our A BJT (B=200) is implemented in an amplifier circuit, with a VCC of 15 volts. One wishes to set the Q point at IC = 5.76 mA and VCE = 6.73 volts (DC). Determine RB.arrow_forward
- 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 KQarrow_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_forwardQ.5. Consider the emitter-follower circuit shown in Figure below. Assume all transistors are matched with VB Efon) = 0.7 V, VCEfsat) = 0.2 V, and VA = 00. Neglect base currents. Determine the maximum and minimum values of output voltage and the corresponding input voltages for the circuit to operate in the linear region. v* =5 V R =1 kQ -OvO R = 1 kQ Q2 V- =-5 V ww.arrow_forward
- 2) Consider the circuit given below. (Assume: K-4mA/V', Vt=-1V, A=0, (K= µCox.(W/L)) da Perform DC analysis and calculate Va. Vsg, Vs, voltages, and Ip, gm, ro values bo Draw a small-signal equivalent circuit Co Calculate Av, Rin, Rout values as shown on the schematic Also ) satwaton mode Test for Fill inthe table VG VSG O2m A Rin Vs QUin ID vo Coo 9m Ro Av Rout Rin Routarrow_forwardConsider the circuit. The transistor has a parameter β that varies between 50 and 200. The operation of the circuit and the electrical variables at the end points must be known. end points. Calculate the following for β = 50 and β = 200. a) lE, VE and VB (DC analysis). b) The input resistance Rin (small signal analysis). c) Voltage gain V0/ Vsig (Small Signal Analysisarrow_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_forward
- This is about BJT amplifiers.arrow_forwardFind this simple circuit configuration (Vth & Rth) seen from the output terminalsarrow_forwardQUESTION 20: The output stage in the following Figure is a Darlington pair emitter-follower configuration. Assume ß= 115 for all npn transistors and ß = 65 for all pnp transistors. Let V47 = 140 V for Q7, V411 = 148 V for Q11, and VA = ∞ for all other transistors. Calculate the small-signal resistance looking into the emitters of Q9 and Qg, i.e. Reg and Res, respectively. Hence, determine the output resistance Ro. Re9 (kn) Format: 9.92 Re8 (2) Format: 74.4 R₂ (22) Format: 22.67 V+ 26 V- Bias - R, = 0.2 kΩ 27 211 www V+ Q9 = 0.2 mA Q8 www IC8= 1 mA Ro -OVO R₁ = 5 kQarrow_forward
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