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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...
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...
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 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...
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)
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