Abstract: Processing circuitry includes an analog filter and filter control circuitry and processes an analog signal having a varying data rate. The analog filter filters the analog signal based on a transfer characteristic to transfer a filtered signal. The filter control circuit processes a data clock signal corresponding to the varying data rate and a reference clock signal to generate a filter control signal to adjust the transfer characteristic in proportion to the varying data rate. The analog filter adjusts the transfer characteristic in proportion to the varying data rate in response to the filter control signal. The processing circuitry may be implemented in a tape, magnetic, or optical drive.

Abstract: An analog-to-digital conversion circuit converts parallel analog voltage signals into corresponding parallel analog current signals. The analog-to-digital conversion circuit multiplexes the parallel analog current signals into a time-interleaved analog current signal. The analog-to-digital conversion circuit converts the time-interleaved analog current signal into a corresponding time-interleaved analog voltage signal and provides gain for the time-interleaved analog voltage signal. The analog-to-digital conversion circuit converts the time-interleaved analog voltage signal into a corresponding digital signal having time-interleaved digital values corresponding to the parallel analog voltage signals.