Description
Class H03M : CODING, DECODING OR CODE CONVERSION, IN GENERAL
Subclass 1/32: Analogue/digital conversion; Digital/analogue conversion (conversion of analogue values to or from differential modulation H03M 3/00) Analogue/digital converters (H03M 1/02-H03M 1/1 take precedence) pattern-reading type using cathode-ray tubes