D/A conversion apparatus

Details D/A conversion apparatus D/A conversion apparatus

1991-09-26

1992-10-20

Logan, Sharon D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 166, H03M 106

Patent

active

051573962

ABSTRACT:
A D/A conversion apparatus includes a high-frequency amplifying and interpolating circuit for amplifying and interpolating only a high-frequency component of an input digital signal so as to produce an amplified and interpolated component together with the other components except the high-frequency component; a D/A converting circuit for converting an output digital signal of the high-frequency amplifying and interpolating circuit into an analog signal; and a suppressing circuit for suppressing a high-frequency component of the analog signal. Accordingly, the apparatus produces an audio signal waveform in which quantizing noise is reduced and high-frequency sound characteristics are improved.

REFERENCES:
patent: 4665513 (1987-05-01), Wengler
patent: 4926179 (1990-05-01), Yoshioka

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