EE 230 HW 14 Spring 2010

EE 230 HW 14 Spring 2010 - EE 230 Homework 14 Spring 2010...

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EE 230 Homework 14 Spring 2010 Solve any 5 of the following 10 problems. Problem 1 A 12-bit ADC with a V REF of 5V is used to digitize small signals with a quiescent value of 2.5V and a variation around the 2.5 V of ± 100mV. What is the SNR of the digitized signal if the ADC is ideal? Problem 2 A 12-bit DAC has an INL of 3LSB. From an INL viewpoint, what is the ENOB of this DAC? Problem 3 Assume the harmonic distortion of a DAC is limited to that of the 2 nd harmonic. If the THD of the DAC is -75dB, what is the SFDR? Problem 4 If a DAC has distortion that is limited to that of 2 nd and 3 rd harmonics only and if the SFDR was specified at -60dB but no information was given about the THD, what is the worst case possible THD for this DAC? Problem 5 Assume a 12-bit ADC used a 5V reference. If the input signal is corrupted with random white noise that has an RMS value of 25mV, what is the SNR at the output of the ADC if the input signal is a sinusoid of value 2V p-p that has a dc offset that puts it in the specified input range of the ADC ?

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This note was uploaded on 02/01/2012 for the course EE 230 taught by Professor Mina during the Fall '08 term at Iowa State.

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EE 230 HW 14 Spring 2010 - EE 230 Homework 14 Spring 2010...

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