Programmable data acquisition system with a microprocessor for c

Details Programmable data acquisition system with a microprocessor for c Programmable data acquisition system with a microprocessor for c

1995-06-02

1997-07-22

Mai, Tan V.

Boots, shoes, and leggings

36472413, G06F 1717, G06F 1710

Patent

active

056509510

ABSTRACT:
A programmable data acquisition system including a plurality of input signal channels for receiving a respective input signal during a normal mode of operation is provided. Individual test circuits are used for selecting respective ones of the plurality of channels to receive predetermined reference signals during a test mode of operation while uninterruptedly providing the normal mode of operation in any remaining unselected channels in the data acquisition system. An analog-to-digital (A/D) converter system allows for supplying quantized electrical signals at a predetermined rate. The A/D converter is responsive to any signals carried in the plurality of signal channels as selected by the individual test circuits. A control unit allows for supplying respective control signals to the test circuits and to the converter system. The data acquisition system is coupled to an external microprocessor having a magnitude and a phase corrector through a microprocessor interface that transfers a microprocessor-derived control word from the microprocessor to the control unit. The microprocessor interface further transfers the stream of quantized electrical signals supplied by the converter system to the microprocessor. The phase corrector provides a predetermined phase angle correction over a predetermined passband to the quantized signals transferred to the microprocessor from the converter system while the magnitude corrector provides a predetermined magnitude correction over the predetermined passband.

REFERENCES:
patent: 4101964 (1978-07-01), Betts
patent: 4881191 (1989-11-01), Morton
patent: 5325318 (1994-06-01), Harris et al.
patent: 5410498 (1995-04-01), Staver
patent: 5436858 (1995-07-01), Staver

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