Analog-to-digital converter having decreased reference voltage t

Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion

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341154, H03M 100

Patent

active

051190974

ABSTRACT:
A parallel comparison type A/D converter having a hysterisis is disclosed in which a reference voltage level for comparing with an input analog signal is switched according to a digital converted signal so that the output digital value has a hysterisis characteristic with respect to the input analog signal. Thus, no flickers or chattering in a displayed segment of a display unit occurs when the input analog signal has a value in close to one of the reference voltages to be compared.

REFERENCES:
patent: 4196420 (1980-04-01), Culmer et al.
patent: 4293848 (1981-10-01), Cheng et al.
patent: 4542368 (1985-09-01), Lillis
patent: 4544912 (1985-10-01), Iwamoto et al.
patent: 4647903 (1987-03-01), Ryu
Analog-Digital Conversion Handbook, Analog Devices Inc., 1986, pp. 216-217.
Millman, Microelectronics: Digital and Analog Circuits and Systems, 1979, McGraw-Hill, pp. 610-611.
"A/D and DA Conversion Technique for a Microcomputer", published on Nov. 5, 1982 from Nikkan Kogyo Shibunsha by Iwao Sagara, pp. 79-81 and 122-125.

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