Time domain multiplexing apparatus for multiple microphones

Details Time domain multiplexing apparatus for multiple microphones Time domain multiplexing apparatus for multiple microphones

1979-07-09

1982-09-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370100, 370114, H04J 302

Patent

active

043521797

ABSTRACT:
A multiplexer is employed for connecting a plurality of microphones and sending an encoded signal over a single line where it is then decoded, filtered and processed such as by amplification.
The multiplexer switches from one microphone channel to the next over an eight channel track, typically at about 2.times.10.sup.6 times/second, and produces a sample duration of about 0.5 microseconds for each channel. Cross talk is reduced by means of a blanking signal which causes the multiplexer to terminate a sample pulse about 120 nanoseconds prior to the onset of a succeeding pulse; this produces a distinct cut-off between sample pulses.
A synchronizing pulse at the end of the last (i.e. eighth) channel terminates each eight channel domain switch over to produce a scan cycle. This is combined with a clock signal in a data encoding circuit.
The synchronizing pulse, sample pulse and blanking signal are then fed to a signal decoder which, after filtering, converts the sample pulse back to a discrete (i.e. continuous) signal, with only about 0.05% distortion, for final amplification.

REFERENCES:
patent: 2468058 (1949-04-01), Grieg
patent: 3065302 (1962-11-01), Kaneko
patent: 3340364 (1967-09-01), Brightman et al.
patent: 3375329 (1968-03-01), Prouty
patent: 4093825 (1978-06-01), Gladstone et al.

Affiliated with

Also associated with

Rating

Time domain multiplexing apparatus for multiple microphones does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time domain multiplexing apparatus for multiple microphones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time domain multiplexing apparatus for multiple microphones will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-402634