Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1978-09-18
1981-02-17
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
332 11D, 340347M, 340347NT, 340347AD, 340347DA, 375 27, H03K 1302
Patent
active
042518040
ABSTRACT:
An analog-to-digital and digital-to-analog conversion system utilizes a modified delta modulation technique, together with generation of a number of linear waveforms forming a piecewise linear approximation of an analog signal to be encoded and decoded, to digitize the analog signal as a pulse train and subsequently retrieve an approximation of the original analog signal from the pulse train. The system comprises encoder and decoder sections of near identical structure. The encoder section includes compare circuits that compare the signal to be encoded to a reference signal and generate therefrom a binary indication of such comparisons. Successive ones of the binary indications form the digital pulse train containing information later used to approximate the analog signal being digitized. A predetermined number of such binary indications immediately preceding the present comparison are temporarily stored and used to generate one of a plurality of linear waveforms, successive ones of which form the reference signal. The decoder section is identical to the encoder section-except that it lacks the compare circuitry. The digital pulse train generated by the encoder is applied to the decoder and used to successively generate selected ones of the plurality of linear waveforms which are used to form the linear piecewise approximation of the original analog signal.
REFERENCES:
patent: 3979676 (1976-09-01), Poma
patent: 4101881 (1978-07-01), De Freitas
patent: 4107610 (1978-08-01), Weber
patent: 4129863 (1978-12-01), Gray et al.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 1972, pp. III-4 to 7.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-64, 65.
Bergen David A.
Scardina Mark V.
LandOfFree
Delta modulation utilizing selectable piecewise linear waveform does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Delta modulation utilizing selectable piecewise linear waveform , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delta modulation utilizing selectable piecewise linear waveform will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2264719