Analog to digital converter using several cascade-connected inte

Details Analog to digital converter using several cascade-connected inte Analog to digital converter using several cascade-connected inte

1997-06-30

2000-12-26

Wamsley, Patrick

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341139, H03M 134, H03M 162

Patent

active

061666742

ABSTRACT:
Disclosed is an analog to digital converter with several cascade-connected interpolation and selection circuits. The function of an interpolation circuit is to produce five pairs of output signals from three pairs of input signals and select three pairs from among the five pairs to apply them to the next stage. Each pair comprises two interpolation signals that vary symmetrically and monotonically as a function of the voltage Vin, the signals of one pair being equal when the voltage Vin is equal to a reference voltage associated with this pair. There are five reference voltage associated with the five pairs. Among these five reference voltages, the three reference voltages (and therefore also the three corresponding pairs of signals) that most closely surround the input voltage Vin are selected. The reference voltages are increasingly closer together as the operation progresses in the succession of cascade-connected stages. The signals used to select the pairs of signals are used in a decoder that gives the bits of the analog-digital conversion.

REFERENCES:
patent: 4455613 (1984-06-01), Shoemaker
patent: 5298814 (1994-03-01), Caruso
patent: 5444447 (1995-08-01), Wingender
patent: 5471210 (1995-11-01), Wingender et al.
patent: 5495247 (1996-02-01), Yamamoto et al.
patent: 5684485 (1997-11-01), Paillardet et al.

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