Radio frequency relay differential voltage control circuit

Abstract

The invention discloses a radio frequency relay differential voltage control circuit which includes two coil loads L1 and L2, two loops of matched resistance circuits, differential amplifiers and amplifying drive circuits which are successively connected, and a radio frequency output circuit. The radio frequency circuit includes corresponding auxiliary contact J1 and radio frequency contact S1, and corresponding auxiliary contact J2 and radio frequency contact S2. The coil load L1 controls the pick-up between the auxiliary contact J1 and the radio frequency contact S1. The coil load L2 controls the pick-up between the auxiliary contact J2 and the radio frequency contact S2. In each loop, the matching resistance circuit is separately connected to two output ends of a differential signal of one twisted-pair cable. According to the invention, the radio frequency relay differential voltage control circuit herein is controlled through differential voltage signals, the differential amplifiers have strong anti-interference capability, the maximum control transmitting range can reach as far as 1200 meters, thus fully satisfying the requirements of control ranges of aviation air-borne signals. According to the invention, the radio frequency relay differential voltage control circuit herein uses differential transmission methods and is advantaged by long control range, fast transmitting range, strong anti-interference capability, and high working stability.

Description

technical field [0001] The invention relates to the field of radio frequency relays, in particular to a differential voltage control circuit for radio frequency relays. Background technique [0002] In the aviation airborne signal control system, there are many control signal lines, long control distance, and large interference from electrical equipment. However, radio frequency relays are mainly used in aircraft airborne radar RF power transmission control, and there is a long control transmission distance. Very susceptible to interference, unreliability and other problems. [0003] The composition of the RF relay is mainly composed of a driving coil and a RF channel. The most basic control method is that the coil is directly energized, and the RF channel is attracted by electromagnetic force to realize the connection or disconnection of the RF relay. With the development of automatic control technology, it is now This method is rarely used. [0004] At present, in the ra...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a radio frequency relay differential voltage control circuit to solve the problems that the existing TTL control circuit has a short control distance (distance less than 5 meters), is susceptible to interference, and has poor reliability of long-distance control signals

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