Analog to digital conversion

• Map analog inputs to a range of binary values

  • 8-bit A/D has outputs in range 0-255

• What if we need more information?

  • linear vs. logarithmic mappings
  • larger range of outputs (16-bit a/d)

0

64

128

192

255

1

10

100

1000

.1

1

10

100

1000

.1

analog

analog

digital

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