Device for testing an analog-to-digital converter
AssigneeDolphin Integration
InventorEric Compagne
Life of this patent
Estimating the term…
Abstract
A device for testing an analog-to-digital converter providing a digital signal at a given sampling frequency, comprising a unit for providing a test signal to the converter, the test signal being a periodic signal comprising frequency components only at a fundamental frequency and at harmonics of the fundamental frequency, the fundamental frequency being a multiple of one quarter of the sampling frequency; a filter capable of receiving the digital signal and of rejecting the fundamental frequency to provide a filtered digital signal; and a unit capable of receiving the digital signal and the filtered digital signal and of providing a signal representative of the ratio between the effective powers of the digital signal and of the filtered digital signal.
Claims10
A device for testing an analog-to-digital converter providing a digital signal at a given sampling frequency, comprising:
- a unit for providing a test signal to the converter, the test signal being a periodic signal comprising frequency components only at a fundamental frequency and at harmonics of the fundamental frequency, the fundamental frequency being a multiple of one quarter of the sampling frequency;
- a filter capable of receiving the digital signal and of rejecting the fundamental frequency to provide a filtered digital signal;
- and
- a unit capable of receiving the digital signal and the filtered digital signal and of providing a signal representative of the ratio between the effective powers of the digital signal and of the filtered digital signal.
A method for testing an analog-to-digital converter providing a digital signal at a given sampling frequency, comprising the steps of:
- providing the converter with a test signal corresponding to a periodic signal comprising frequency components only at a fundamental frequency and at harmonics, the fundamental frequency being a multiple of one quarter of the sampling frequency;
- filtering the digital signal to reject the fundamental frequency;
- and
- determining the ratio between the effective powers of the digital signal and of the filtered digital signal.
Dependencies are inferred from the claim text.