Current-to-digital converter with wide dynamic range

Abstract

The present invention relates to a current-to-digital converter and the current-to-digital converter according to an example embodiment includes an integrator connected to a current source that outputs input current; a quantizer connected to the integrator and configured to generate a first digital output code corresponding to alternating current (AC) in the input current; a first loop circuit formed on a delta-sigma (ΔΣ) loop that connects an input terminal of the integrator and an output terminal of the quantizer; a second loop circuit formed on a truncation-noise-shaped baseline-servo (TNS-BS) loop that connects the input terminal of the integrator and the output terminal of the quantizer and configured to generate a second digital output code corresponding to direct current (DC) in the input current; and an adder configured to generate a final digital output code by adding the first digital output code and the second digital output code.

Dependencies are inferred from the claim text.