AD converter and data processing unit

Details AD converter and data processing unit AD converter and data processing unit

2009-05-18

2010-11-09

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Sample and hold

C341S141000, C341S155000

Reexamination Certificate

active

07830286

ABSTRACT:
An AD converter includes an input circuit, an operation circuit and a bus interface. The input circuit is provided with a pull-down circuit, which is capable of pulling down an analog signal input side of a sample-hold circuit whether an analog signal is inputted or not. The operation circuit is provided with a reference voltage conversion result storing register, which is capable of storing a conversion result of an analog reference voltage inputted periodically separately from a conversion result of the analog signal inputted through the sample-hold circuit. The operation circuit is further provided with a check register, which is capable of writing in and reading out data for checking operation of a signal transfer system including a bus interface through the bus interface. Thus, it is made possible to confirm normality of an external part and an internal part of the AD converter.

REFERENCES:
patent: 6653963 (2003-11-01), Barrenscheen et al.
patent: 7009537 (2006-03-01), Kabune
patent: 7245248 (2007-07-01), Morita et al.
patent: 5-314281 (1993-11-01), None

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