Telephonic communications – Subscriber line or transmission line interface
Patent
1998-03-04
2000-12-26
Dorvil, Richemond
Telephonic communications
Subscriber line or transmission line interface
379411, 379412, 341143, 341155, 341156, 341158, H04M 100, H04M 908, H03M 300
Patent
active
061671320
ABSTRACT:
An analog successive approximation (SAR) analog-to-digital converter (ADC) is disclosed that is a compromise between a SAR ADC implementation and a fully parallel thermometer-to-binary ADC. The analog SAR ADC utilizes N comparators for N bits of output and does not require a clock system, control logic, decode logic, or thermometer-to-binary decode circuitry. Conversion speed is determined by the comparator rate, and the comparator outputs may be used directly as the ADC outputs. The analog SAR ADC disclosed is a low complexity, low-precision analog-to-digital converter (ADC) that may be used to digitize phone line status information so that it may be communicated across a isolation barrier as digital information.
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Krone Andrew W.
Scott Jeffrey W.
Sooch Navdeep S.
Welland David R.
Chawan Vijay B
Dorvil Richemond
Silicon Laboratories Inc.
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