ANALOG INPUT/OUTPUT DEVICE

ANALOG INPUT/OUTPUT DEVICE

PURPOSE:To improve the responsiveness and the reliability by quickly performing A/D conversion with a loop of a comparing means, a microprocessor, and a D/A converter. CONSTITUTION:An analog input/output device consists of a microprocessor 1, a D/A converter 2, a signal holding circuit 3, a multiple...

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1. Verfasser: OGATA YOSHIKAZU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODE CONVERSION IN GENERAL
CODING
COMPUTING
COUNTING
DECODING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
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creator OGATA YOSHIKAZU
description PURPOSE:To improve the responsiveness and the reliability by quickly performing A/D conversion with a loop of a comparing means, a microprocessor, and a D/A converter. CONSTITUTION:An analog input/output device consists of a microprocessor 1, a D/A converter 2, a signal holding circuit 3, a multiplexer means 4, and a comparing means 5. A first switch SW1 controlled by the microprocessor 1 is provided between the D/A converter 2 and the signal holding circuit 3 and is connected to the side of a contact (a) at the time of A/D conversion and is connected to the side of a contact (d) at the time of D/A conversion. The microprocessor 1 performs A/D conversion of a prescribed reference voltage inputted through the multiplexer means 4 by the A/D conversion loop and obtains a span by the result. The microprocessor 1 outputs two kinds of digital signal different in value to be outputted and subjects them to A/D conversion and obtains the error direction of the gain. Thus, the error due to the variance of the gain of the signal holding circuit 3 is corrected to correct the output error.
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CONSTITUTION:An analog input/output device consists of a microprocessor 1, a D/A converter 2, a signal holding circuit 3, a multiplexer means 4, and a comparing means 5. A first switch SW1 controlled by the microprocessor 1 is provided between the D/A converter 2 and the signal holding circuit 3 and is connected to the side of a contact (a) at the time of A/D conversion and is connected to the side of a contact (d) at the time of D/A conversion. The microprocessor 1 performs A/D conversion of a prescribed reference voltage inputted through the multiplexer means 4 by the A/D conversion loop and obtains a span by the result. The microprocessor 1 outputs two kinds of digital signal different in value to be outputted and subjects them to A/D conversion and obtains the error direction of the gain. 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subjects BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODE CONVERSION IN GENERAL
CODING
COMPUTING
COUNTING
DECODING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
title ANALOG INPUT/OUTPUT DEVICE
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