Societe Nationale Industrielle Et Aerospatiale

Societe Anonyme Dite: Aerospatiale Societe Nationale Industrielle

Eric Autechaud

Christian N'Guyen

Christophe Fleury

Remi Bascans

A poller including an output (S), as well as a first (E1), a second (E2), and a third (E3) input, receiving respectively a first (E.sub.s 1), a second (E.sub.s 2), and a third (E.sub.s 3) signal, which are identical during normal operation. The poller further includes a two-channel diverter (AIG1) provided with an active input (A), a quiescent input (R), a control input (EC) and a common output (SC). The quiescent input (R) and the active input (A) of the diverter (AIG1) are respectively connected to the first (E1) and second (E2) inputs of the poller, whereas the common output (S) of the diverter (AIG1) is connected to the output (S) of the poller. A first monitor (M1) with two inputs (X, Y), branched between the second and third inputs (E2, E3) of the poller, is used to measure the deviation between the second (E.sub.s 2) and third (E.sub.s 3) signals and to control the diverter (AIG1).

Three-input poller

A three-input signal selector formulates two output signals from three input signals. The selector is useful in pollers of various types.

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Toulouse, France

Eric Autechaud