Abstract: The invention relates to a transistorized static relay.This relay comprises a power amplifier stage having a first bipolar transistor of a first type (npn or pnp), whose collector is connected to the input of the relay and whose emitter is connected to the output of said relay, or vice versa. This relay also has a control stage of the power stage transistor. This control stage comprises at least one bipolar control transistor of a second type (pnp or npn) opposite to the first type, whose emitter is connected to the input or output and whose collector is connected to the base of the transistor of the power stage. The base of the control transistor receives a switching control current interrupting or authorizing the flow of supply current in the load connected to the output of the relay, the impedance of the amplifier stage varying in the reverse direction of the value of the control current and the collector of the low value power transistor is connected to the generator supplying the relay by an impedance.

Abstract: The invention relates to a relay authorizing or interrupting the flow of a current in a load circuit.This relay comprises a static electronic switch connected to the load circuit, a control circuit connected to the switch for authorizing or interrupting the flow of current in the load circuit due to the switch. The control circuit comprises a supply input connected to one point of the load circuit and, connected in series between said input and the load circuit, a control switch, a current generator with two terminals and at least one impedance limiting the current flowing in the load circuit to a negligible value compared with the value of the current flowing in the load circuit when said flow is permitted. The voltage at the terminals of the generator is at least equal to the highest voltage between two random points of the load circuit.Application to circuits in which flows a current with a random direction or an alternating current, or to a current inverter.

Abstract: The composite part is constituted by a plate of flexible material such as plastic which has electrical and/or thermal insulating properties, at least one face of the plate being provided with a metal cladding which is subjected to a photoetching process in order to form raised metallic portions corresponding to a printed circuit pattern, for example. Permanent deformation of the raised metallic portions can be produced by means of a mechanical cold-forming process without exceeding the range of elastic deformation of the flexible plate.