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Solution: Maximize the Input Signal

The key to reducing the effects of the noise is to maximize the input signal level. What this means is that the HCI designer should increase the gain of the signal conditioning circuitry until the maximum sensor output is equal to the tex2html_wrap_inline2018 of the ADC. It is also possible to reduce tex2html_wrap_inline2018 down to the maximum level of the sensor. The problem with this is that the noise will corrupt the small signals. A good rule of thumb is to keep tex2html_wrap_inline2018 at least as large as the maximum digital signal, usually 5V.

Tim Stilson
Thu Oct 17 11:25:23 PDT 1996