Analog-to-digital converting module for related light sensing device

摘要

An analog-to-digital module includes a sampling unit, for generating an output voltage between a positive output end and a negative output end according to a positive input voltage of a positive input end and a negative input voltage of a negative input end; a comparing unit, for generating a digital output signal according to magnitude relationship between the output voltage and a reference voltage; a variable current source, for generating a variable current according to the digital output signal at the negative input end in a first period according to a control signal; a measured current source, for generating a measured current at the negative input end; and an adjusting unit, for adjusting the output voltage according to the digital output signal in a second period according to the control signal; wherein the first period does not overlap the second period.

主权项

1. An analog-to-digital module, comprising:
a sampling unit, for generating an output voltage between a positive output end and a negative output end according to a positive input voltage of a positive input end and a negative input voltage of a negative input end; a comparing unit, for generating a digital output signal according to magnitude relationship between the output voltage and a reference voltage; a variable current source, for generating a variable current according to the digital output signal at the negative input end in a first period according to a control signal; a measured current source, for generating a measured current at the negative input end; and an adjusting unit, for adjusting the output voltage according to the digital output signal in a second period according to the control signal; wherein the first period does not overlap the second period.