Digital arrangement having for its object to shunt ground separa

Details Digital arrangement having for its object to shunt ground separa Digital arrangement having for its object to shunt ground separa

1988-11-30

1991-01-01

Shoop, Jr., William M.

Coded data generation or conversion

Analog to digital conversion followed by digital to analog...

341118, 341126, 358 21R, H03M 100, H04N 964

Patent

active

049821903

ABSTRACT:
Digital circuit for shunting a ground separation plane, formed, for example, by a transformer, and present in a digital signal path. In this circuit a long sequence of equal bits offered to one side of such a ground separation plane must be conveyed further at the other side as a replica of said first bit sequence. Such sequences in essence represents a direct current. According to the invention, there is provided at the ingoing end of such a ground separation plane a modulator for up-modulating a bit stream applied thereto on a carrier frequency for which the ground separation plane is transparent. At the discharge end of the ground separation plane a demodulator is provided for down-modulation in such manner that a replica is obtained of the bit stream applied to the digital modulator. For such a modulator and such a demodulator use can be made of an XOR-gate or a D-flip-flop, respectively.
A preferred use of the invention relates to a video circuit with A/D and D/A conversion, respectively.

REFERENCES:
patent: 4736238 (1988-04-01), Moriyama et al.
Hornung et al., "Aufbereitung von Fernsehsignalen fur 140 Mbits/s-Verbindungen", Telecom Report 10, 1987.

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