Amptec Research 620A SERIES, Руководство по эксплуатации и обслуживанию

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E-3. Circuit Descriptions
The circuit descriptions which follow are
referenced to Figures E-1, E-2, E-3 and the
schematic diagrams at the back of this
manual. In the following descriptions,
references to integrated circuits are given in
the form "IC201-1", which refers to
Integrated Circuit 201, pin 1.
E-4. Analog-to-Digital Converter
The A to D conversion is done with a
ICL8068 /ICL71C03 chip set. The ICL8068
takes care of the analog part and the
ICL71C03 takes care of the digital part of
the 4 ½ digit 20,000 count dual slope
conversion.