Directional separator-coupler circuit for medium-frequency carrier currents on a low-voltage electrical line
First Claim
1. A directional separator-coupler circuit for medium-frequency carrier currents on an electrical line of a low voltage alternating current network having a characteristic frequency, said circuit comprising a parallel resonant circuit connected in the electrical line and having a resonant frequency close to the central frequency of the pass band of the medium-frequency carrier currents, and a transmitter-receiver circuit for transmitting and receiving said carrier currents which is voltage coupled to said resonant circuit by a connecting circuit, said connecting circuit comprising a series connecting branch for current coupling said transmitter-receiver circuit to said line at said medium-frequency and for decoupling said transmitter-receiver circuit from said line at the characteristic frequency of the low-voltage alternating current network.
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Accused Products
Abstract
A directional separator-coupler circuit is provided for a medium-frequency carrier current on an electrical line of a low-voltage alternating current network. The separator-coupler circuit comprises a parallel resonant circuit (C,L) inserted into the electrical line and a circuit (E) for the transmission-reception of the carrier currents which are voltage-coupled to the resonant circuit by a connecting circuit (D). The connecting circuit also comprises a series connecting branch (Ld, Cd) which enables current coupling of the transmission-reception circuit (E) and the medium-frequency line, as well as decoupling thereof.
118 Citations
10 Claims
- 1. A directional separator-coupler circuit for medium-frequency carrier currents on an electrical line of a low voltage alternating current network having a characteristic frequency, said circuit comprising a parallel resonant circuit connected in the electrical line and having a resonant frequency close to the central frequency of the pass band of the medium-frequency carrier currents, and a transmitter-receiver circuit for transmitting and receiving said carrier currents which is voltage coupled to said resonant circuit by a connecting circuit, said connecting circuit comprising a series connecting branch for current coupling said transmitter-receiver circuit to said line at said medium-frequency and for decoupling said transmitter-receiver circuit from said line at the characteristic frequency of the low-voltage alternating current network.
Specification