Time-interleaved samplers

Details Time-interleaved samplers Time-interleaved samplers

2006-05-23

2006-05-23

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Converter calibration or testing

C341S118000, C341S141000, C341S155000

Reexamination Certificate

active

07049984

ABSTRACT:
This invention relates to a method of calibrating a time-interleaved analogue-to-digital sampler (10) and to a method of performing analogue-to-digital conversion with a sampler (10) so calibrated. The invention provides a method of calibrating a sampler (10) comprising N time-interleaved ADCs (12a–d), the method comprising the steps of: (a) injecting in turn N calibration signals (13) into the sampler such that each calibration signal (13) occupies one of N related frequencies; (b) determining the input signal for each one of the N calibration frequencies (13); (c) measuring in the frequency domain the output at each of the N related frequencies for each one of the N calibration frequencies; and (d) determining the relationship that relates the input signal to the output at each of the N related frequencies for each one of the N calibration frequencies.

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