Patent ID: 8009070

Claim:
A method for compensating frequency response mismatch errors in an M-channel time-interleaved analog-to-digital converter comprising M analog-to-digital converters (1 1 -1 M ) in an array and a filter connected to the output of the time-interleaved analog-to-digital converter, the method comprising: determining M frequency responses Q r from said M-channels, calculating separately M channel impulse responses h r for said M-channels, calculating matrix elements of M matrices S r and vectors c r being factors of error power functions P r , minimizing said power functions P r by inverting separately said M matrices S r , forming M output subsequences utilizing convolutions of the impulse responses being calculated separately and the output of the time-interleaved analog-to-digital converter, and forming an overall output from the compensated time-interleaved analog-to-digital converter by interleaving output subsequences y r of the channels.