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@ -10,7 +10,7 @@ internal DAC and try it. |
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The AD9833 is connected to SPI on pins PA4 (SS), PA5 (SCK), and PA7 (MOSI). |
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Pins PA1 and PA2 are used by the ADC and attach before and after the filter (DUT). |
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The generator has a very low output amplitude (0.65 V max). To better utilize the |
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The generator has low output levels (0.65 V max). To better utilize the |
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input range of the ADC, I used OP213 in a non-inverting configuration |
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(resistors 7.5k and 2.2k), with a 10M resistor from the input to GND. This gives us gain |
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of around 4.4, enough to reach just under 3V. |
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