Apparatus adaptable for use in effecting communications between

Details Apparatus adaptable for use in effecting communications between Apparatus adaptable for use in effecting communications between

1989-10-30

1991-02-19

Shoop, Jr., William M.

Coded data generation or conversion

Analog to digital conversion followed by digital to analog...

341 61, 36472401, H03M 100, H03M 700

Patent

active

049948016

ABSTRACT:
An apparatus adaptable for use in effecting communications between an analog device and a digital device, having an analog-digital-analog circuit for converting incoming analog signals received from the analog device to incoming digital signals, and for converting interpolated outgoing digital signals to outgoing analog signals. The apparatus further has a digital signal processing circuit for decimating the incoming digital signals and providing a decimated incoming digital signal to the digital device, and for interpolating outgoing digital signals received from the digital device and providing an interpolated outgoing digital signal to the analog-digital-analog device. The analog-digital-analog device includes a single digital-to-analog converter and switches for selectively configuring the analog-digital-analog circuit to effect conversion of incoming analog signals to incoming digital signals or, alternatively, to effect conversion of interpolated outgoing digital signals to outgoing analog signals. The digital signal processing circuit is comprised of a plurality of modules which are configured so that a specified set of the plurality of modules effects a specified number of iterations of decimation and a specified number of iterations of interpolation. Certain of the specified set of modules participate in both the decimation and interpolation operations. The modules are further designed so that additional modules may be added to the specified set of modules to increase the iterations of decimation or to increase the iterations of interpolation, or to increase the iterations of both decimation and interpolation.

REFERENCES:
patent: 4020332 (1977-04-01), Crochiere et al.
patent: 4855743 (1989-08-01), Hester

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