Analog/digital converter configuration with sigma-delta modulato

Details Analog/digital converter configuration with sigma-delta modulato Analog/digital converter configuration with sigma-delta modulato

1990-12-10

1991-12-24

Scott, J. R.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341155, H03M 302

Patent

active

050756796

ABSTRACT:
An analog/digital converter configuration includes sigma-delta modulators being triggered by an analog input signal and emitting digital output signals at a predetermined sampling rate. The sigma-delta modulators have input circuits with amplification factors. Amplifiers are each connected upstream of a respective one of the sigma-delta modulators. First sampling rate reducers are each connected downstream of a respective one of the sigma-delta modulators. Damping elements are each connected downstream of a respective one of the first sampling rate reducers. Each of the damping elements have a damping factor equal to the inverse of the amplification factor occurring in the input circuit of a corresponding one of the sigma-delta modulators. A priority logic is connected downstream of the damping elements. A second sampling rate reducer is connected downstream of the priority logic. An output is connected downstream of the second sampling rate reducer. The priority logic switches a signal from the first sampling rate reducers to the output after evaluation of signals from the first sampling rate reducers.

REFERENCES:
patent: 4951052 (1990-08-01), Jacob et al.
patent: 4968987 (1990-11-01), Nafa et al.
ICASSP 86, Proceedings, Apr. 7-11, 1986, IEEE New York, U.S., Taniguchi et al.
IEEE Journal of Solid-State Circuits, vol. 23, No. 3, Jun. 1988, New York, U.S., pp. 736-741; J. Robert et al.
ICASSP 88, Apr. 11-14, 1988, IEEE New York, U.S.: E. Dijkstra et al., pp. 2001-2004.
IEEE Transactions on Circuits and Systems, vol. CAS-25, No. 7, Jul. 1978, Tewksbury et al.
B. G. Teubner Stuttgart 1989, pp. 276-309, Lo Hess: "Digitale Filter".

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