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Dual Slope A/D Converter


Dual Slope ADC

Dual Slope A/D Converter

Definition

A dual slope ADC converts an analog signal into digital form using integration and timing.

Working Principle

1. Integration Phase

The input voltage is applied to an integrator for a fixed time, causing a steady change in output.

2. De-integration Phase

A reference voltage is applied in reverse, and the time taken for the output to return to zero is measured.

Result: This time is proportional to the input voltage.

Summary

  • High accuracy
  • Excellent noise rejection
  • Slower operation speed

Applications

  • Digital voltmeters
  • Measurement instruments
  • Precision systems

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