Analog Devices International Unlimited Company

Nevena Rakuljic

Donald W Paterson

Sharvil Pradeep Patil

Asha Ganesan

CT ADCs based on continuous-time residue generation systems require accurate estimation of analog transfer functions. This is done by using a pseudo random bit sequence, injected using a DAC, that traverses the transfer function to be measured. Mismatch in the injection DAC introduces errors in the transfer function estimation and results in poor NSD at the ADC output. Techniques are described to improve the accuracy of the transfer function estimate despite DAC mismatch and despite the presence of an input signal.

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Del Mar, CA, United States of America

Nevena Rakuljic