Homework Answers
1) Here, infinite input resistance would be best for sensing open circuit voltage . This is due to high output voltage gain .
2) Here, zero output resistance would be best for making the load current independent of load resistance . This is due to low output voltage gain .
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Block-diagram-level amplifier design. In a certain application, an amplifier is needed to sense the open-circuit voltage...
A signal source with an open-circuit voltage of Vs = 2 mV rms and an internal...
A signal source with an open-circuit voltage of Vs = 2 mV rms and an internal resistance of 50 kΩ is connected to the input terminals of an amplifier having an open-circuit voltage gain of 100, an input resistance of 135 kΩ , and an output resistance of 4 Ω. A 4 Ω load is connected to the output terminals. Find Voltage gain Avs = V0/Vs Find voltage gain Av = V0/Vi Find current gain Ai Find power gain G...
An amplifier has an open-circuit voltage gain of 160. With a 10 kΩ load connected, the...
An amplifier has an open-circuit voltage gain of 160. With a 10 kΩ load connected, the voltage gain is found to be only 80. Find the output resistance of the amplifier. Ro=
Figure 2 shows a feedback amplifier circuit. Rs is the source resistor and R, is the...
Figure 2 shows a feedback amplifier circuit. Rs is the source resistor and R, is the load resistor RS Vs VI RL OPAMP R2 R1 RM R3 R4 Step 1: open-loop and closed-loop circuits identification 1.1 Identify the source, the load, and the closed-loop amplifier 1.2 Identify the open-loop amplifier (**A" eireuit) and the feedback network (B" eircuit) in the closed-loop amplifier 1.3 Identify the connection type between the "A" circuit and the "B" circuit at both the input and...
2. An amplifier has an input resistance R 10k2. When it is driven by a current...
2. An amplifier has an input resistance R 10k2. When it is driven by a current source of luA with source resistance Rs-100k2, it has a short-circuit output current of 10mA and an open- circuit output voltage of 10V. When driving a load resistance RL-4kΩ at the output, what is 40% the voltage gain Av, current gain Ai, and power gain Ap in dB?
4. Design a npn BJT C-E amplifier circuit for the following specifications and given values: Voltage...
4. Design a npn BJT C-E amplifier circuit for the following specifications and given values: Voltage Gain Input resistance Load resistance Supply voltage Av = -60 Ri = 5k92 RL = 6k2 Vcc= 16V Assume Re is fully bypassed. The input source internal resistance Rs = 0.12. B=120 and VBE= 0.65V. Draw the actual circuit and its ac equivalent circuit
(a) The figure below shows the small-signal equivalent circuit of a voltage amplifier. The open-circuit output...
(a) The figure below shows the small-signal equivalent circuit of a voltage amplifier. The open-circuit output of the supply v10 V (i) Determine the resistances if the regulation should be less than 5 % when 1 W is being delivered to a resistive load connected across vo in the mid frequency range. If the low frequency 3dB point is at 1 kHz and the high frequency 3 dB point is 100 kHz what are the capacitance values. Assume the circuit...
8. Suppose the voltage output of a battery is 10.0V in a series circuit, and the...
8. Suppose the voltage output of a battery is 10.0V in a series circuit, and the resistances are Ri=4.0012, R2=5.0092, and R3=6.002. a. Draw a diagram of the circuit, and determine the total resistance, the current through each resistor, the voltage drop across each resistor, and the power dissipated by each resistor and the source. 9. Suppose the voltage output of a battery is 10.0V in a parallel circuit, and the resistances are Ri=4.0012, R=5.0002, and R3=6.092. b. Draw a...
course: Electronics. please show all your work. I will rate you. D9.50. Design to increase input...
course: Electronics.
please show all your work. I will rate you.
D9.50. Design to increase input resistance and decrease output resistance. A certain differential amplifier has an input resistance of 100 ks2, an output resistance of 200 S2, and an open-circuit voltage gain of 5000. The source has an internal resistance of 10 ks2, and the load resistance is 1k12. A macromodel for the amplifier is displayed in Figure P9.50. It is desired to increase the input impedance to 1MS...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit R, is the source resistor, R is the feedback resistor and R, is the load resistor. The op-amp has an internal input resistance of R, an intemal output resistance R, and an internal gain of A Apply the "Systematic Analysis" method in this question. Figure 3 3.a State the feedback topology used in the amplifier circuit and which type of feedback amplifier is shown...
3. Design a n-channel JFET C-S amplifier circuit for the following specifications Voltage Gain input resistance...
3. Design a n-channel JFET C-S amplifier circuit for the following specifications Voltage Gain input resistance Ri-100kΩ Load resistanceR2k2 Given supply voltage VDD 20V Αν--10 Rss is fully bypassed The input source resistance Rs 02, Ipss-8mA and Vp4V Assume RD and R1 but must find R2 and RSS using the given specifications. Find the DC Operating Points values (VGs, ID and VDs) Draw the actual circuit and its ac equivalent circuit
Figure 2 shows a feedback amplifier circuit. Rs is the source resistor and R, is the load resistor RS Vs VI RL OPAMP R2 R1 RM R3 R4 Step 1: open-loop and closed-loop circuits identification 1.1 Identify the source, the load, and the closed-loop amplifier 1.2 Identify the open-loop amplifier (**A" eireuit) and the feedback network (B" eircuit) in the closed-loop amplifier 1.3 Identify the connection type between the "A" circuit and the "B" circuit at both the input and...
2. An amplifier has an input resistance R 10k2. When it is driven by a current source of luA with source resistance Rs-100k2, it has a short-circuit output current of 10mA and an open- circuit output voltage of 10V. When driving a load resistance RL-4kΩ at the output, what is 40% the voltage gain Av, current gain Ai, and power gain Ap in dB?
4. Design a npn BJT C-E amplifier circuit for the following specifications and given values: Voltage Gain Input resistance Load resistance Supply voltage Av = -60 Ri = 5k92 RL = 6k2 Vcc= 16V Assume Re is fully bypassed. The input source internal resistance Rs = 0.12. B=120 and VBE= 0.65V. Draw the actual circuit and its ac equivalent circuit
(a) The figure below shows the small-signal equivalent circuit of a voltage amplifier. The open-circuit output of the supply v10 V (i) Determine the resistances if the regulation should be less than 5 % when 1 W is being delivered to a resistive load connected across vo in the mid frequency range. If the low frequency 3dB point is at 1 kHz and the high frequency 3 dB point is 100 kHz what are the capacitance values. Assume the circuit...
8. Suppose the voltage output of a battery is 10.0V in a series circuit, and the resistances are Ri=4.0012, R2=5.0092, and R3=6.002. a. Draw a diagram of the circuit, and determine the total resistance, the current through each resistor, the voltage drop across each resistor, and the power dissipated by each resistor and the source. 9. Suppose the voltage output of a battery is 10.0V in a parallel circuit, and the resistances are Ri=4.0012, R=5.0002, and R3=6.092. b. Draw a...
course: Electronics.
please show all your work. I will rate you.
D9.50. Design to increase input resistance and decrease output resistance. A certain differential amplifier has an input resistance of 100 ks2, an output resistance of 200 S2, and an open-circuit voltage gain of 5000. The source has an internal resistance of 10 ks2, and the load resistance is 1k12. A macromodel for the amplifier is displayed in Figure P9.50. It is desired to increase the input impedance to 1MS...
EEET255 Electronics Page 4 of6 QUESTION 3: [25 marks] Figure 3 shows a feedback amplifier circuit R, is the source resistor, R is the feedback resistor and R, is the load resistor. The op-amp has an internal input resistance of R, an intemal output resistance R, and an internal gain of A Apply the "Systematic Analysis" method in this question. Figure 3 3.a State the feedback topology used in the amplifier circuit and which type of feedback amplifier is shown...
3. Design a n-channel JFET C-S amplifier circuit for the following specifications Voltage Gain input resistance Ri-100kΩ Load resistanceR2k2 Given supply voltage VDD 20V Αν--10 Rss is fully bypassed The input source resistance Rs 02, Ipss-8mA and Vp4V Assume RD and R1 but must find R2 and RSS using the given specifications. Find the DC Operating Points values (VGs, ID and VDs) Draw the actual circuit and its ac equivalent circuit
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