Multi-rate analog-to-digital converter

Details Multi-rate analog-to-digital converter Multi-rate analog-to-digital converter

2005-02-15

2005-02-15

Wambley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S061000, C341S123000

Reexamination Certificate

active

06856266

ABSTRACT:
A Multi-Rate Analog-to-Digital Converter (19) is coupled to a single crystal oscillator (17) as a reference clock and has at least two separate channels arranged to sample and convert input data at two differing clock rates. Each channel derives a clock signal from the reference clock. Associated with each of the channels is a Sigma-Delta converter (10a, 10b) comprising a modulator (12), a filter (14) and a resampler (18). The modulator (12) receives input data and provides a data signal to the filter (14), which itself provides a filtered data signal to the associated data resampler. The data resampler resamples the data and provides a digital output signal. As there is sampling in the digital domain the advantages associated with signal processing, speed and low noise injection are obtained. Similarly as the output of the modulator (12) is in digital form, it can be manipulated and processed readily and with the existing software.

REFERENCES:
patent: 5856796 (1999-01-01), Akune et al.
patent: 6542094 (2003-04-01), Venkitachalam et al.
patent: 6584145 (2003-06-01), Camagna et al.
patent: 6608572 (2003-08-01), Venkitachalam et al.
patent: 794621 (1997-09-01), None
patent: 1 120 915 (2001-08-01), None
PCT/EP02/10129 PCT Search Report mailed Mar. 6, 2003.

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