This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 0.5s 1.0s Figure 8.5. The amplitude of a plucked string drops exponentially in time. -2-1 1 2 0.005 0.01 0.015 0.02 Time (sec) Sound Amplitude Figure 8.6. A simple chord mixing the notes C and G. How much memory does it take to store a song 3 minutes Stereo channels 44 kHz 12-bit per channel How many bus cycles does it take to output one value? Fetch data from memory Decompress Filter/amplify/mix/envelop DAC speed How do we test Lab 8? Static testing Complete coverage 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 Corner testing 0,1,2 13,14,15 Interval 0 4 8 12 Voltmeter in AC mode is measure of noise R M S = ∑ − i i V V n 2 ) ( 1 Dynamic testing Oscilloscope (voltage versus time) Spectrum analyzer (voltage versus frequency) The bottom line DAC and OC interrupts create waveforms DAC and ADC have the same two fundamental limits Sampling rate: signal has 0 to ½ fs Number of bits: Resolution = Range/Precision Static testing versus dynamic testing...
View Full Document
This note was uploaded on 09/19/2010 for the course E E 16280 taught by Professor Valvano during the Fall '10 term at University of Texas.
- Fall '10