Texas Instruments Corporation

Olympus Communication Technology of America, Inc.

Layne Lisenbee

Ghobad Heidari-Bateni

Robert Townsend Short

An analog-to-digital converter can use a variable sampling rate. By using a variable sampling rate analog-to-digital converter and an anti-aliasing filter lower sampling rates, and accordingly, generally lower power consumption may be achieved. For example, a lower sampling rate can be used when it is determined that no undesirable signals are present and a higher sampling period can be used when an undesirable signal is present. Determining the presence of an undesired signal can be based on signal-to-noise ratio, over-sampling, bit error rate, using a detector, etc. An undesirable signal can be any signal that is close in frequency to a signal of interest or a signal farther away in frequency that has a relatively high amplitude. Sampling rate can be varied in a binary fashion, stepwise, continuously, etc.

Variable rate analog-to-digital converter

An apparatus for removing DC offset in a received data signal is presented. The apparatus measures the DC offset present in a data symbol and uses it to generate a compensation value which is then removed from a future data symbol. An enable signal is used to prevent updating of the compensation value during the reception of a data symbol.

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Layne Lisenbee