Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1979-10-29
1981-12-15
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
375103, H03K 1302
Patent
active
043062229
ABSTRACT:
A digital-to-analog converter is described for converting (b+a)-bit code words into an analog signal by means of a b-bit auxiliary digital-to-analog converter. In order to reduce the quantizing noise introduced by the indispensible quantizing of the (b+a)-bit code words for obtaining the b-bit code words these (a+b)-bit code words are applied to an integrating network which has its output connected to an amplitude-limiting device which brings the integrated signal in the signal range of the auxiliary-D/A converter. The output signal of the amplitude-limiting device is now quantized and this quantizing signal is applied to the auxiliary D/A converter which produces analog output signal samples which are applied to, possibly, an analog output filter through a cascade arrangement of an amplitude-restorer and a difference network.
The (b+a)-bit code words are assumed to occur with a frequency which is higher than the Nyquist sampling frequency associated with the analog signal represented by these (b+a)-bit code words.
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Claasen Theodoor A. C. M.
Mecklenbrauker Wolfgang F. G.
Peek Johannes B. H.
van Hurck Nicolaas
Briody Thomas A.
Cannon, Jr. James J.
Mayer Robert T.
Miller Charles D.
U.S. Philips Corporation
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