Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1984-03-21
1986-09-30
Roskoski, Bernard
Communications: electrical
Audible indication
Percussion-type sound producer
340347M, H03M 100
Patent
active
046149368
ABSTRACT:
Method for the interpolative conversion of an analog input signal to a digital output signal including forming an intermediate signal from the input signal; integrating the intermediate signal; sampling the integrated intermediate signal at a sampling frequency which is a multiple of the Nyquist frequency to form a sampled signal; quantizing the sampled signal with an amplitude resolution corresponding to one bit to form a quantized signal; forming a feedback signal from the quantized signal, the feedback signal comprising pulses the peak amplitude of which can be one of two representative values and which return to a mean value within an interval equal to one period of the sampling frequency; combining the feedback signal with the input signal to form the intermediate signal; passing the quantized signal through a digital lowpass filter; and sampling the output of the digital lowpass filter to produce a PCM signal, the PCM signal constituting the digital output signal.
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Musmann Hans G.
Weidenbruch Hans U.
ANT Nachrichtentechnik GmbH
Roskoski Bernard
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