Patent ID: 7916064

Claim:
A voltage-to-digital converting device adapted for converting an input voltage into a digital signal, said voltage-to-digital converting device comprising: a first voltage-to-time converter adapted for receiving a reference clock and the input voltage, and outputting a first delay clock in response to the input voltage, the first delay clock having a first time delay relative to the reference clock, the first time delay corresponding to the input voltage; a second voltage-to-time converter adapted for receiving the reference clock and a feedback voltage, and outputting a second delay clock in response to the feedback voltage, the second delay clock having a second time delay relative to the reference clock, the second time delay corresponding to the feedback voltage; and a time-to-digital converting circuit coupled to said first and second voltage-to-time converters for receiving the first and second delay clocks therefrom, comparing phases of the first and second delay clocks, generating the feedback voltage based on result of phase comparison made thereby, and outputting the digital signal upon detecting that the phases of the first and second delay clocks are in-phase.