MULTIPLEXER INPUT CHANGEOVER DEVICE

• Main Authors: FUJIYAMA KENJI, NOGAMI TSUGIO, SERIKAWA KAZUNORI
• Format: Patent
• Language: English
• Published: 30.04.1993
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; PULSE TECHNIQUE

PURPOSE:To realize the high speed changeover processing of multi-stage input signals with inexpensive circuit configuration by adopting 2-stage configuration of plural multiplexers and a multiplexer for high speed changeover switch for the device. CONSTITUTION:A signal extracted from plural multiplexers A-D is fed to a high speed changeover multiplexer E, in which the signals are selected one by one and extracted and fed to an A/D converter 17. The converted digital data are stored in a memory 18. Moreover, a multiplexer controller 19 controls the multiplexers A-E so that an input signal fed to the multiplexers A-D is outputted in this order and the signals fed to the multiplexer E are outputted sequentially and controls the operation of the A/D converter 17 synchronously with the changeover of the multiplexer E. Thus, signals twice or over successively are not outputted from one multiplexer and the signal is read by the other multiplexers for a changeover time of each multiplexer.