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14.4 An amplifier with a bandwidth of 1 GHz has a gain of 15 dB and...
Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a front-end preamplifier of gain ...
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Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a front-end preamplifier of gain (A) equal to 20 dB and a noise-figure (NF) of 4 dB. The preamplifier is followed by a mixer stage with a NF 18 dB. Suppose the signal-to-noise ratio (SNR) at the mixer output is 30 dB, find the SNR at the preamplifier input. Hint: Use Friis formula F21F (Answer hints: NF (Total)...
Noise-related problems Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a...
Noise-related problems Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a front-end preamplifier of gain (A) equal to 20 dB and a noise-figure (NF) of 4 dB. The preamplifier is followed by a mixer stage with a NF 18 dB. Suppose the signal-to-noise ratio (SNR) at the mixer output is 30 dB, find the SNR at the preamplifier input. Hint: Use Friis formula: Answer hints: NF (Total) 4.96 dB)
Question # B.5 (a) In a communication system, suppose the associated operating temperature is dou...
Question # B.5 (a) In a communication system, suppose the associated operating temperature is doubled. Then, what is the corresponding change in the system capacity (C), if the signal power-level at the input is kept constant? Is C a linear function of temperature? Justify (b) A mixer-stage in a radio receiver has a NF 20 dB and this mixer-stage is preceded by a preamplifier with a NF - 9 dB. The available power-gain ratio of the amplifier is equal to...
Question # B.5 signal power-level at the coresponding change in is signal power-level at the inpu...
Question # B.5 signal power-level at the coresponding change in is signal power-level at the input is kept constant? Is C a linear function of temperature? Justify (a) In a communication system, suppose the associated operating temperature is doubled. Then, what is the corresponding change in the system capacity (C), if the (b) A mixer-stage in a radio receiver has a NF-20 dB and this mixer-stage is preceded by a preamplifier with a NF 9 dB. The available power-gain ratio...
Noise, noise figure, microwave theory, Please attempt both, clearly show me all the steps. Please 3. Derive an expression for noise figure for a cascaded amplifier section. What deduction can you make...
Noise, noise figure, microwave theory, Please attempt both,
clearly show me all the steps. Please
3. Derive an expression for noise figure for a cascaded amplifier section. What deduction can you make from this equation? . Assuming you have three amplifiers with the following parameters in table Q1; Table Q1 AmplifierNoise Figure (dB)] Gain (dB) 6 20 20 7 7.4 10 Gh3 How would would you arrange these amplifiers in a cascade to minimise the noise figure?
3. Derive an...
12 oblem # 6 The front-endof has a a radio receiver has a preamplifier followed by a mixer stage. The mixer stage with lactorN2-100 and the pre amplifier has NF, 9 dB. The overall noise factor of...
12 oblem # 6 The front-endof has a a radio receiver has a preamplifier followed by a mixer stage. The mixer stage with lactorN2-100 and the pre amplifier has NF, 9 dB. The overall noise factor of the 11.04. Suppose a signal of power-level equal to 5 dBm is watts,h imput of the preamplifier. Determine the output power-level of the preamplifier in Useful hint-Friis formula: SOLUTION
12 oblem # 6 The front-endof has a a radio receiver has a preamplifier...
15. Design an inverting amplifier to have a gain of 20 using the MCP6021 and a...
15. Design an inverting amplifier to have a gain of 20 using the MCP6021 and a single +5 V supply. What will be the typical 3-dB bandwidth of the amplifier?
b) An amplifier has values of V = 24mV and Vout gain of the circuit 2V....
b) An amplifier has values of V = 24mV and Vout gain of the circuit 2V. Calculate the dB voltage (2 marks) c) For the circuit shown in Figure 11, calculate the lower critical frequency due to the output RC circuit. Vec +15 V R 3.9 LO C V. R. 0.33 uF 2N3904 600 n 0.1 F 5.6 k REI 33 0 R 22 k 50 mVpp 1.5 k 100 F (5 marks) Figure 11 12. a) Name the type...
3. The noiseless amplifier below has a bandwidth of 1 MHz at a temperature of 0°C....
3. The noiseless amplifier below has a bandwidth of 1 MHz at a temperature of 0°C. If the signal noise radio is 66 dB at the output, find the signal input voltage in HV. vi o 15dB o Vo 12K
VS W l such a junction? (5 c) Suppose a (200+j75)- load is to be matched...
VS W l such a junction? (5 c) Suppose a (200+j75)- load is to be matched to a 300-2 transmission line to give SWR = 1. Determine the reactance of the stub and the characteristic impedance of the quarter-wave transformer, both connected directly to the load. d) (5 marks) i. For a given communication system, briefly explain the meaning of the following terms: Thermal Noise, Noise Figure, and Noise Temperature. A given communication system has a 12 GHz receiver that...
WRITE LEGIBLY OR TYPE THE ANSWERS WITH EXPLANATIONS
THANKS!!!
Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a front-end preamplifier of gain (A) equal to 20 dB and a noise-figure (NF) of 4 dB. The preamplifier is followed by a mixer stage with a NF 18 dB. Suppose the signal-to-noise ratio (SNR) at the mixer output is 30 dB, find the SNR at the preamplifier input. Hint: Use Friis formula F21F (Answer hints: NF (Total)...
Noise-related problems Question # B.4 An RF system having a RF-bandwidth of 1 MHz, has a front-end preamplifier of gain (A) equal to 20 dB and a noise-figure (NF) of 4 dB. The preamplifier is followed by a mixer stage with a NF 18 dB. Suppose the signal-to-noise ratio (SNR) at the mixer output is 30 dB, find the SNR at the preamplifier input. Hint: Use Friis formula: Answer hints: NF (Total) 4.96 dB)
Question # B.5 (a) In a communication system, suppose the associated operating temperature is doubled. Then, what is the corresponding change in the system capacity (C), if the signal power-level at the input is kept constant? Is C a linear function of temperature? Justify (b) A mixer-stage in a radio receiver has a NF 20 dB and this mixer-stage is preceded by a preamplifier with a NF - 9 dB. The available power-gain ratio of the amplifier is equal to...
Question # B.5 signal power-level at the coresponding change in is signal power-level at the input is kept constant? Is C a linear function of temperature? Justify (a) In a communication system, suppose the associated operating temperature is doubled. Then, what is the corresponding change in the system capacity (C), if the (b) A mixer-stage in a radio receiver has a NF-20 dB and this mixer-stage is preceded by a preamplifier with a NF 9 dB. The available power-gain ratio...
Noise, noise figure, microwave theory, Please attempt both,
clearly show me all the steps. Please
3. Derive an expression for noise figure for a cascaded amplifier section. What deduction can you make from this equation? . Assuming you have three amplifiers with the following parameters in table Q1; Table Q1 AmplifierNoise Figure (dB)] Gain (dB) 6 20 20 7 7.4 10 Gh3 How would would you arrange these amplifiers in a cascade to minimise the noise figure?
3. Derive an...
12 oblem # 6 The front-endof has a a radio receiver has a preamplifier followed by a mixer stage. The mixer stage with lactorN2-100 and the pre amplifier has NF, 9 dB. The overall noise factor of the 11.04. Suppose a signal of power-level equal to 5 dBm is watts,h imput of the preamplifier. Determine the output power-level of the preamplifier in Useful hint-Friis formula: SOLUTION
12 oblem # 6 The front-endof has a a radio receiver has a preamplifier...
b) An amplifier has values of V = 24mV and Vout gain of the circuit 2V. Calculate the dB voltage (2 marks) c) For the circuit shown in Figure 11, calculate the lower critical frequency due to the output RC circuit. Vec +15 V R 3.9 LO C V. R. 0.33 uF 2N3904 600 n 0.1 F 5.6 k REI 33 0 R 22 k 50 mVpp 1.5 k 100 F (5 marks) Figure 11 12. a) Name the type...
3. The noiseless amplifier below has a bandwidth of 1 MHz at a temperature of 0°C. If the signal noise radio is 66 dB at the output, find the signal input voltage in HV. vi o 15dB o Vo 12K
VS W l such a junction? (5 c) Suppose a (200+j75)- load is to be matched to a 300-2 transmission line to give SWR = 1. Determine the reactance of the stub and the characteristic impedance of the quarter-wave transformer, both connected directly to the load. d) (5 marks) i. For a given communication system, briefly explain the meaning of the following terms: Thermal Noise, Noise Figure, and Noise Temperature. A given communication system has a 12 GHz receiver that...
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