| 摘要 |
PCT No. PCT/GB84/00019 Sec. 371 Date Sep. 27, 1984 Sec. 102(e) Date Sep. 27, 1984 PCT Filed Jan. 25, 1984 PCT Pub. No. WO84/03191 PCT Pub. Date Aug. 16, 1984.Method of adjusting a BORSHT/SLIC circuit and to a circuit arrangement therefor. The BORSHT/SLIC circuit includes a pair of signal paths coupling a receive terminal of a four-wire interface with the terminals of a two-wire subscriber line. An applied current is periodically switched from one to the other of the terminals of the two-wire interface and the gain of at least one of the signal paths is adjusted in response to detected common mode signals induced by the applied current in a signal path coupling the terminals of the two-wire interface with the transmit terminal of the four-wire interface.
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