Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1981-11-12
1984-09-25
Sloyan, T. J.
Communications: electrical
Audible indication
Percussion-type sound producer
340347CC, 340347M, H03K 1302
Patent
active
044738188
ABSTRACT:
A bipolar digital to analog converter having a pair of identically configured digital to analog networks, the outputs of which are summed. The input of these networks are connected by an appropriate control circuit which, depending upon whether the digital data is negative or positive, directs the data to one or the other of the networks, to progressively turn that network "on" or "off", depending upon whether the data is increasing or decreasing in its relative value, and biases the network not receiving the data either completely "off" or completely "on".
REFERENCES:
patent: 3403393 (1968-09-01), Skrenes
patent: 3582939 (1971-06-01), Campbell
patent: 3877023 (1975-04-01), Spicer et al.
patent: 4346368 (1982-08-01), Johnson
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-55 to 59; II-32 to 43.
Sklar, 2's Complement Arithmetic Operations, Computer Design, vol. 11, No. 5, 5/1972, pp. 115-121.
Analog Devices, Inc., Data Acquisition Products Catalog, AD7520(AD7521), 10-bit(12-bit) D/A Converter, 1978, 2 Sheets+Cover.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, p. II-44.
Bauer William D.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Sloyan T. J.
Smith James A.
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