PLEASE SHOW WORK IF POSSIBLE. THANK YOU . A digital voltmeter of 0 to 1999 mV is

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PLEASE SHOW WORK IF POSSIBLE. THANK YOU

.

A digital voltmeter of 0 to 1999 mV is used to measure two voltages. One is 1230 mV and the other is 758 mV. A calculator shows that the quotient of these voltages is 1.622691293. if the voltmeter has an accuracy limit of 1%, what is a more reasonable expression of this ratio? An amplifier has a gain of 20dB. This represents an output-to-input ratio of An amplifier has three amplification stages and a lOdB attenuator in cascade. Assuming that all impedances are properly matched, what is the overall gain if the amplification factors are 5, 10, and 6dB? Express your answer in decibels and in no decibel form.

Explanation / Answer

Answer question

Ans 17:

Let A be the gain , i.e. the ratio of the output to the input.

20 log(A) = 20

Therefore A=10.

Ans 18:

Gains in dB are added.

The total gain in dB is 6+10+6-10 = 11dB (The -10dB is for the attenuator of 10dB)

The avreall gain is 10^(0.55) = 3.55 V/V

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