US 6,982,664 B1
Timing enhancement methods and networks for time-interleaved analog-to-digital systems
David G. Nairn, Greensboro, N.C. (US)
Assigned to Analog Devices, Inc., Norwood, Mass. (US)
Filed on Nov. 04, 2004, as Appl. No. 10/982,201.
Int. Cl. H03M 1/06 (2006.01)
U.S. Cl. 341—118 26 Claims
OG exemplary drawing
 
1. A method of correcting sampling errors in analog-to-digital converters of a time-interleaved system that converts an analog input signal to a corresponding digital output signal, comprising the steps of:
in said analog input signal, inserting a timing signal that has first and second different signal amplitudes at first and second different sides of predetermined sample times; and
with each of said converters:
a) converting respective samples of said analog input signal to respective digital output signals; and
b) adjusting the timing of said samples with a correction signal whose value is determined by contributions of said first and second amplitudes to said respective digital output signals;
wherein said inserting step includes the step of configuring said timing signal to have a waveform that defines a first amplitude level prior to said sample times and a different second amplitude level subsequent to said sample times.