Boots – shoes – and leggings
Patent
1983-12-13
1986-05-27
Lall, Parshotam S.
Boots, shoes, and leggings
364557, 73708, 340347CC, G06F 1520
Patent
active
045920028
ABSTRACT:
A method of digital temperature compensation uses a digital temperature compensation word to produce a digital word modification of a digital input to a temperature sensitive digital to analog converter hereinafter converter. The method includes the steps of sensing the temperature affecting the converter to produce a digital temperature representation which is used by a digital computer to produce an output in accordance with a characterization equation in the form of Output=f(D, M) where D=digital data and M=f(temperature). The temperature stability of the converter is affected by the temperature stability of a reference voltage circuit used in the converter and having a voltage reference diode. A compensation circuit uses a temperature sensor in the form of a second diode, which is thermally coupled to the reference diode, and a tracking type analog-to-digital converter for converting an analog signal. The output of the analog-to-digital converter is supplied as a digital word to a digital computer system which uses the digital word to modify a digital input to the converter. The computer system includes a non-volatile memory in which is stored a characterization equation which describes the performance of the converter as a function of the digital output signal from the computer and the digital representation of temperature from the analog-to-digital converter. Thus, the output from the digital-to-analog converter is compensated for the effect of temperature on the converter.
REFERENCES:
patent: 4418392 (1983-11-01), Hata
patent: 4444055 (1984-04-01), Balkanli
patent: 4464725 (1984-08-01), Briefer
patent: 4468968 (1984-09-01), Kee
patent: 4479190 (1984-10-01), Takai et al.
Bozarth, Jr. Theodore B.
Olsen Arthur M.
Rowlands Ronald H.
Halista Mitchell J.
Honeywell Inc.
Joike Trevor B.
Lall Parshotam S.
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