Programmable digital temperature controller apparatus

Details Programmable digital temperature controller apparatus Programmable digital temperature controller apparatus

1981-11-23

1984-07-31

Chin, Gary

Boots, shoes, and leggings

377 25, 374170, G05D 2300

Patent

active

044634366

ABSTRACT:
A programmable digital temperature controller apparatus utilizing a pair of binary-coded decimal units and a switching unit to generate a ten bit binary word which represents a pre-selected temperature in a temperature range. A pair of erasable programmable read only memory units store digital temperatures and temperature range information. The ten bit binary word determines which digital data from the memory units will be applied to a D/A converter unit and a pair of multiplexer units. One multiplexer unit controls the voltage per bit within the D/A converter unit while the other multiplexer unit generates a starting voltage. The output voltage from the D/A converter unit and the starting voltage are summed together to provide a voltage output signal which represent the pre-selected temperature.

REFERENCES:
patent: 4198676 (1980-04-01), Varnum et al.
patent: 4234927 (1980-11-01), First
patent: 4274145 (1981-06-01), Hendricks et al.
patent: 4370731 (1983-01-01), Sasaki et al.

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