Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-01-27
1987-06-23
Curtis, Marshall M.
Communications: electrical
Continuously variable indicating
With meter reading
364488, 364580, 371 20, 324158F, H04Q 100, H03K 1908
Patent
active
046756736
ABSTRACT:
Programmable pin drivers allow PROM pins to be individually programmed and regulated to specified voltages and currents. Each pin is assigned a voltage multiplexer to select a regulated voltage and a power amplifier to supply current. The source voltage to the power amplifier is determined by the maximum and minimum reference voltages needed by the device under test. This allows a full 70 volt range of pin voltages to be seleced without substitution of pin driver parts, although individual parts have a dynamic range of only about 40 volts, and reduces thermal power dissipation. It also allows very fast microprocessor-driven switching of input voltages to pins, by changing the reference voltages assigned to the individual pins' voltage multiplexers.
REFERENCES:
patent: Re31056 (1982-10-01), Chau et al.
patent: 4335457 (1982-06-01), Early
patent: 4439858 (1984-03-01), Petersen
Hnatek, "Ausen's Handbook of DIA and AID Converters", 1976, pp. 13, 50-51, 182-184.
Millman, "Micro Electronics: Digital and Analog Circuits and Systems", 1979, pp. 609, 338-342.
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