Analog signal multiplexer with noise rejection

Details Analog signal multiplexer with noise rejection Analog signal multiplexer with noise rejection

1988-12-21

1991-09-03

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

Plural transmitters

34087017, 34087021, G08C 1506

Patent

active

050458515

ABSTRACT:
In analog multiplexers using solid state multiplexing relays and having a shunt capacitor circuit across each input channel as part of a filter for normal mode noise, common mode noise is rejected by opening the shunt capacitor circuit in at least the selected channel and preferably all channels during the switching cycle of each channel for a full cycle of the a.c. line frequency, the opening spanning the deselection time for the selected channel and the selection time for the next channel.

REFERENCES:
patent: 3271651 (1966-09-01), Diederich
patent: 3281808 (1966-10-01), Church et al.
patent: 3764983 (1973-10-01), Stok
patent: 3913488 (1976-03-01), Kazahaya
patent: 4188617 (1980-02-01), Fauchies et al.
patent: 4307335 (1981-12-01), Paulson
patent: 4380764 (1983-04-01), Connors
patent: 4496250 (1985-01-01), Walsh

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