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# Solution: Calculate the equivalent noise resistance for this television receiver

#### Problem Statement: Principles of Communications

Noise Problem Solving

The front-end of a television receiver, having a bandwidth of 7 Mhz, and operating at a temperature of 27หC , consists of an amplifier having a gain of 15 followed by a mixer whose gain is 20. The amplifier has a 300 โฆ input resistor and a shot noise equivalent resistance of 500 โฆ; for the mixer, these values are 2.2 kโฆ and 13.5 kโฆ respectively, and the load resistance of the mixer is 470 kโฆ. Calculate the equivalent noise resistance for this television receiver.

A. 8760 โฆ

B. 875 โฆ

C. 8.76 โฆ

D. 0.876 โฆ

The equivalent noise resistance for this television receiver is equal to 875 โฆ.

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