Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1984-01-27
1985-10-01
Sloyan, T. J.
Communications: electrical
Audible indication
Percussion-type sound producer
340347CC, 340347DA, 340347M, H03K 1302
Patent
active
045449120
ABSTRACT:
A D/A converter of the resistor ladder type provided with full-scale switching circuits between the output terminal of the series connected resistors and ground for selecting the value of resistance of the full-scale control resistor, thereby selecting the value of the full-scale voltage.
REFERENCES:
patent: 3810158 (1974-05-01), Murakami et al.
patent: 4020485 (1977-04-01), Busby
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. III-50 and III-51, II-32 to II-39.
Stout, Basic Electrical Measurements, Prentice-Hall, Inc., 1950, pp. 50-56.
Millman et al., Pulse and Digital Circuits, McGraw-Hill Book Co., Inc., 1956, pp. 2 and 3.
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 175-179.
Digital Equipment Corporation, Analog-Digital Conversion Handbook, 1964, pp. 39, 40 and 59.
Iwamoto Hiromu
Tamada Haruo
Fujitsu Limited
Sloyan T. J.
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