Method and circuit for regulating the signal level fed to an...

Details Method and circuit for regulating the signal level fed to an... Method and circuit for regulating the signal level fed to an...

2005-01-25

2005-01-25

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S139000, C381S312000

Reexamination Certificate

active

06847318

ABSTRACT:
Methods and devices for converting an analog input signal into a digital output signal by means of an analog-to-digital converter are provided. The analog input signal is multiplied by a first adjustable scaling factor to form an analog intermediate signal. The analog intermediate signal is converted into a digital representation. The digital representation is multiplied by a second adjustable scaling factor to form a sample signal, and a third adjustable scaling factor to form the digital output signal. The level of the sample signal is determined and compared to first and second threshold values, with the first threshold value being greater than the second threshold value. The first adjustable scaling factor is increased and the second and third adjustable scaling factors are decreased if the sample signal level is higher than the first threshold value. The first adjustable scaling factor is decreased and the second and third adjustable scaling factors are increased if the sample signal level is lower than the second threshold value.

REFERENCES:
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patent: 5553151 (1996-09-01), Goldberg
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patent: 6359992 (2002-03-01), Preves et al.
patent: 6628224 (2003-09-01), Mulder et al.
patent: 6664910 (2003-12-01), Mulder et al.

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