Method of reconstructing an analog signal, particularly in digit

Details Method of reconstructing an analog signal, particularly in digit Method of reconstructing an analog signal, particularly in digit

1990-01-24

1991-05-07

Ng, Jin F.

Telephonic communications

Subscriber line or transmission line interface

328 27, 341144, H04M 100

Patent

active

050143042

ABSTRACT:
A method of reconstructing an analog signal, particularly for digital telephony, comprises a first step of digital-to-analog conversion, wherein a first reconstruction of the analog signal is provided by introducing a distortion component into the frequency spectrum whose amplitude decreases with the signal frequency, and a second step of filtering carried out by means of a reconstruction filter provided with integrators and having a cut-off frequency F.sub.t. That attenuating distortion component is utilized instead of one of the integrators in the reconstruction filter, to afford a reduction of the overall design of the circuit device operating in accordance with this method, and bring about, as a result, decreased occupation of the integrated circuit and power dissipation.

REFERENCES:
"Passive and Active Network Analysis and Synthesis", A. Budak, Houghton Mifflin Co., Boston, 1974, p. 553.
"Digital and Analog Communication Systems", L. Couch III, MacMillan Publishing Co., N.Y., 1983, pp. 20-24, 109-111.
"Linear Applications", National, J. Byerly et al., Dec. 1972, pp. AN69-1-AN69-3.
"Solid-State Circuits and Applications", D. Mackenroth, Prentice-Hall, Englewood Cliffs, N.J., 1984, p. 147.
"Digital Filters", R. W. Hamming, Prentice-Hall, Englewood Cliffs, N.J., 1983, pp. 38-43.
Signetics Corporation, 1972, pp. 6-24, 6-27, 6-30, 6-36, 6-42.

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