Frequency-channel multiplexer and demultiplexer

Details Frequency-channel multiplexer and demultiplexer Frequency-channel multiplexer and demultiplexer

1995-03-08

1997-11-25

Ton, Dang

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

370480, 333119, H04J 100

Patent

active

056919875

ABSTRACT:
A circuit of low complexity which selects arbitrary channels from a plurality of multichannel input signals and generates from a plurality of individual frequency channels a plurality of output signals whose channel composition can be freely selected, consists of a plurality of bandpass filters (BP1, BP2 . . . BPn) which are tuned to the individual frequency channels and whose input and output are respectively connected to a gate of one of a plurality of circulators (Z11, Z12 . . . Z1n; Z21, Z22 . . . Z2n) connected in a chain. In this case, at least two circulator chains are present (ZK1, ZK2), and a circulator (Z11, Z12 . . . Z1n; Z21, Z22 . . . Z2n) from one of the circulator chains can be optionally switched to the input and output of each bandpass filter (BP1, BP2 . . . BPn).

REFERENCES:
patent: 3931623 (1976-01-01), Sones et al.
patent: 4039947 (1977-08-01), Miedema
patent: 4211894 (1978-10-01), Watanabe et al.
patent: 4688259 (1987-08-01), Edridge
patent: 5233609 (1993-08-01), Hunton

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