Filter for digitally processing an analog input signal with...

Details Filter for digitally processing an analog input signal with... Filter for digitally processing an analog input signal with...

2005-10-11

2005-10-11

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

06954160

ABSTRACT:
A filter is described for digitally processing an analog input signal with analog feedback. In one example, the filter uses a topology similar to a second order universal filter block and includes a signal combiner for producing an analog output signal based upon an analog input signal and one or more analog feedback signals. An analog to digital converter processes the analog output signal into a digital data stream which is digitally processed to produce one or more digital output signals which are converted to one or more analog feedback signals. The digital processing can include a bandpass transfer function and a lowpass transfer function. The filter may be implemented in mixed-signal CMOS using standard CMOS processing techniques.

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“About oversampling, noise shaping, digital filtering, and decimation”, Maxim, May 2003, pp. 38-39.

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