| 摘要 |
A simple (cheap) circuit which selects any desired channels from a plurality of multichannel input signals and produces a plurality of output signals from a plurality of individual frequency channels, the channel composition of which output signals can be selected freely, consists of a plurality of bandpass filters (BP1, BP2...BPn) which are tuned to the individual frequency channels and the input and output of each of which are in each case connected to a gate of a plurality of circulators (Z11, Z12...Z1n; Z21, Z22...Z2n) which are connected in a chain (are concatenated). In this case, there are at least two circulator chains (ZK1, ZK2) and one circulator (Z11, Z12...Z1n; Z21, Z22...Z2n) from one of the circulator chains can optionally be connected to the input or output of each bandpass filter (BP1, BP2...BPn). <IMAGE>
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