SELF-CALIBRATING VCO-BASED ANALOG-TO-DIGITAL CONVERTER AND METHOD THEREOF

摘要

A circuit includes an input dispatch unit for receiving an input signal and a calibration signal and outputting N dispatched signals in accordance with a selection signal. The circuit also includes N analog-to-digital converter (ADC) units for receiving the N dispatched signals, N control signals, and N mapping tables and outputting N raw data, and N refined data, respectively. An output dispatch unit receives the N refined data and outputting an output data in accordance with the selection signal, and a calibration controller receives the N raw data and outputting the selection signal, the N control signals, the N mapping tables, and a digital code. A DAC (digital-to-analog converter) receives the digital code and outputting the calibration signal, wherein one of the dispatched signals, as specified by the selection signal is from the calibration signal while the other dispatched signals are from the input signal.

主权项

1. A circuit comprising:
an input dispatch unit for receiving an input signal and a calibration signal and outputting N dispatched signals in accordance with a selection signal, where N is an integer greater than two; N analog-to-digital converter (ADC) units for receiving the N dispatched signals, N control signals, and N mapping tables and outputting N raw data, and N refined data, respectively; an output dispatch unit for receiving the N refined data and outputting an output data in accordance with the selection signal; a calibration controller for receiving the N raw data and outputting the selection signal, the N control signals, the N mapping tables, and a digital code; and a DAC (digital-to-analog converter) for receiving the digital code and outputting the calibration signal, wherein the selection signal has N possible values, and one of the N dispatched signals as specified by the selection signal is from the calibration signal while the other N−1 dispatched signals are from the input signal.