Circuit for generating a configuration signal for a network syst

Details Circuit for generating a configuration signal for a network syst Circuit for generating a configuration signal for a network syst

1994-04-05

1995-05-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 161, 370 851, 370 8512, 370 8515, 307 98, 307 99, H04L 12437

Patent

active

054147093

ABSTRACT:
A station of a ring network includes (1) a circuit for generating a configuration signal for connecting the station into the network and (2) a load circuit coupled to the first node and ground for receiving a DC component of the configuration signal. The DC component of the configuration signal is transparent with respect to data transmission of the network. A decoupling capacitor is coupled to the first node and ground for bypassing an AC component of the configuration signal at the first node to ground such that only the DC component of the configuration signal is applied to the load circuit. The circuit for generating the configuration signal includes (1) a first switch coupled to a power supply and a second node and (2) a capacitor coupled to the second node and ground. A second switch is provided in the circuit that is connected between the first and second nodes. The first and second switches alternately connect the capacitor to the power supply and to the first node such that the configuration signal is generated at the first node. The capacitor has a capacitance that can be substantially accurately set such that an impedance of the circuit is substantially accurately set. A logic circuit is provided in the circuit for generating a first control signal to the first switch and a second control signal to the second switch to alternately close the first and second switches.

REFERENCES:
patent: 4937476 (1990-06-01), Bazes

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