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. The front end of a television receiver, having a bandwidth of 7 MHz and operating at a temperature of 27°​ ​C, consists of amplifiers having a gain of 15, followed by a mixer whose gain is 20. The amplifier has a 300Ω​ input resistor and a shot noise equivalent resistance of 500Ω​ ​. For the mixer; these values are 2.2k​Ω and 13.5 k​Ω​, respectively, and the load resistance of the mixer is 470 k​Ω​. Calculate the equivalent noise resistance for this

. The front end of a television receiver, having a bandwidth of 7 MHz and operating at a temperature of 27°​ ​C, consists of amplifiers having a gain of 15, followed by a mixer whose gain is 20. The amplifier has a 300Ω​ input resistor and a shot noise equivalent resistance of 500Ω​ ​. For the mixer; these values are 2.2k​Ω and 13.5 k​Ω​, respectively, and the load resistance of the mixer is 470 k​Ω​. Calculate the equivalent noise resistance for this

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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4. The front end of a television receiver, having a bandwidth of 7 MHz and
operating at a temperature of 27°​ ​C, consists of amplifiers having a gain of 15, followed by a mixer whose gain is 20. The amplifier has a 300Ω​ input resistor and a shot noise equivalent resistance of 500Ω​ ​. For the mixer; these values are 2.2k​Ω and 13.5 k​Ω​, respectively, and the load resistance of the mixer is 470 k​Ω​. Calculate the equivalent noise resistance for this television receiver.

5. A receiver connected to an antenna whose resistance is 50​Ω has an equivalent noise resistance of 30​Ω.​ What is the receiver’s noise temperature?

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