| 摘要 |
<p>PURPOSE:To enable transmission without variation of the load impedance characteristics even for a transmission line to which devices having various impedance characteristics are connected at random, by discriminating the presence or absence of a signal at a receiving part and from the sum of voltage and current. CONSTITUTION:The current flowing to a transmission line 2 is extracted by a coil 5 and with connection of magnetic fluxes, and at the same time the voltage is also extracted by a connection. While a capacitor 6 and the coil 5 form a series resonance circuit, and the capacitor 6 extracts only high frequencies corresponding to the signal and then exclude other frequency components such as the power supply frequency, etc. As a result, the voltage having nearly the same level as the transmitting level is obtained with a small load effect. While the voltage corresponding to the current is obtained with a large load effect. Usually the voltage having both effects is obtained.</p> |
