l14 - 6.111 Lecture # 14 Lab 3 Assignment: Digital filter...

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6.111 Lecture # 14 Lab 3 Assignment: Digital filter Audio Frequencies (music, speech) Input from waveform generator, microphone, ‘boom box’ Output to oscilloscope or speaker We provide a variety of filters: your kit must provide for a selection of one of 16 (4 bits) from switches 1
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Input is digitized and sampled Filter is FIR (next slides) Output is through D/A converter (as in sample and hold) 2
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This is what your machine Wait for a fixed time interval Output what was computed in Store the sample just taken Do the FIR filter algorithm, (No, this is not out of order)… should do: Sample the input signal the last sample Start the A/D conversion which is a convolution Go back for more… 3
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Convolution is a weighted sumof the last n samples. The FIR (‘Finite Impulse Response’) filter can do most all filtering functions (high pass, low pass, etc.) 4
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Altera Flex: EPF10K10 or EPF 10K70 FPGA Analog Devices AD670 A/D converter Analog Devices AD 580 D/A converter
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This note was uploaded on 07/20/2009 for the course ELECTRICAL 6.111 taught by Professor Prof.dontroxel during the Fall '02 term at MIT.

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l14 - 6.111 Lecture # 14 Lab 3 Assignment: Digital filter...

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