Analog-to-digital conversion circuits and method for calibrating thereof
AssigneeMediatek Inc.
InventorZwei-Mei Lee
Life of this patent
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Abstract
An analog-to-digital conversion circuit is provided and includes an input unit, at least one analog-to-digital converter, and a processing unit. The input unit receives an analog input signal and outputs an analog output signal. A first reference signal is injected into the input unit, and the analog output signal is related to the first reference signal. The at least one analog-to-digital converter receives the analog output signal and converts the analog output signal to a digital output signal. The processing unit receives the digital output signal and performs correlation computation on the digital output signal with a second reference signal to generate a calibration parameter.
Claims23
An analog-to-digital conversion circuit, comprising:
- an input unit for receiving an analog input signal and outputting an analog output signal, wherein a first reference signal is injected into the input unit, and the analog output signal is related to the first reference signal;
- at least one analog-to-digital converter, for receiving the analog output signal and converting the analog output signal to a digital output signal;
- and
- a processing unit for receiving the digital output signal and performing correlation computation on the digital output signal with a second reference signal to generate a calibration parameter.
A time-interleaved analog-to-digital conversion circuit with background calibration, comprising:
- an input unit for receiving an analog input signal and outputting an analog output signal, wherein a reference signal is injected into the input unit, and the analog output signal is related to the reference signal and the analog input signal;
- a plurality of analog-to-digital converters, for receiving the analog output signal and respectively converting the analog output signal to digital output signals according to a plurality of timing clocks;
- and
- a processing unit for receiving at least one of the digital output signals, and extracting a calibration parameter for analog-to-digital conversion gain compensation according to the digital output signal.
A method for calibrating an analog-to-digital conversion circuit, comprising:
- providing an analog input signal and a first reference signal;
- generating an analog output signal according to the analog input signal and the first reference signal;
- converting the analog output signal into at least one digital output signal;
- and
- performing a correlation computation on the digital output signal to generate a calibration parameter.
Dependencies are inferred from the claim text.