Circuit arrangement for bistable switching at least one switching contact, and its use in a device of the entertainment electronics

摘要

In the unactuated state of a key switch element (s) is its rest output (4) with a first supply line (1) are electrically connected, in the actuated state of the actuation gear (5). The actuation of gear (5) is connected via a parallel connection of a main relay coil (l1) with a first auxiliary relay coil (l2) and a first two-way circuit (8), the quiescent output (4) via a second auxiliary relay coil (l3) and a second two-way circuit (12) with a second supply line (2) are electrically connected to the. The first two-way circuit (8) has at its ends change-over switch (9, 10), whose outputs are arranged in opposite directions relative to each other diodes (d1, d2) are electrically connected. The same applies to the second two-way circuit (12). The main relay coil (l1), switching contacts (k1, k2), bistable. The two auxiliary relay coils (l2, l3) switching in each case two change-over switch (9, 10, 13, 14) of the repeated shifting (8, 12), bistable. A response time (t₁) of the main relay (l1, k1, k2) is at most as large as a response time (t₂) of the first auxiliary relay (l2, 9, 13).