トランジスタ化AD/DA変換器

概要

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Described herein is a transistorized AD/DA Converter which has both analog-to-digital and digital-to-analog conversions.<BR>In the analog-to-digital conversion, the instrument accepts 0-5V input voltages with the input impedance higher than 500kΩ and operates on them to produce 0-1000 digital output signal (real out-put is binary coded signal) in 130μ sec with accuracy and precision of 0.1%. The, operation is, of the voltage feedback encoding method.In the digital-to-analog conversion, 0-1000 digital input, signals, are converted into 0--5V output voltages with the equivalent accuracy to that of analog-to-digital conversion. Its output impedance is Iess than 1Ω.<BR>The silicon diodes are employed to gate the weighted currents in the DA conversion circuit from which feedback voltages are obtained in the analog -to-digital conversion and the output voltages in digitalto-analog conversion. As all the circuits of the instrument are carefully compensated against the temperature change, it can be used in ambient temperature 5-50°C.
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