Circuit arrangement comprising two feed circuits connectable to

Details Circuit arrangement comprising two feed circuits connectable to Circuit arrangement comprising two feed circuits connectable to

1985-07-01

1986-12-16

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Diverse or unlike electrical characteristics

307130, 307 64, 361 91, 361 62, 379348, H02J 700

Patent

active

046299050

ABSTRACT:
A circuit arrangement comprises two feed circuits which are connectible to a load with mutually opposite polarity. The circuit arrangement avoids mechanical contacts in the load circuit, at least with respect to one feed circuit. This is achieved in that switches, provided for the activation at at least one of the feed circuits, are disposed outside of the output circuit and in that a transistor is disposed between such a feed circuit and the load, this transistor being conductive given an activated feed circuit and being inhibited given a deactivated feed circuit. The circuit arrangement can advantageously be employed in remote feed devices of communications transmission device for the purpose of optionally feeding a remote feed section with a remote feed current or with a fault locating voltage.

REFERENCES:
patent: 3760228 (1973-09-01), Uchida
patent: 4285057 (1981-08-01), Sbuelz
patent: 4357545 (1982-11-01), Le Grand et al.
patent: 4362952 (1982-12-01), Ziegler
patent: 4408248 (1983-10-01), Bulley et al.
patent: 4459491 (1984-07-01), Ziegler
patent: 4462058 (1984-07-01), Ziegler

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