An arrangement for ensuring that a proper control level for a controlled unit is maintained when a supply voltage is removed from a control unit of a control system includes a switching circuit coupled between the control unit and the controlled unit. The controlled unit couples the control signal generated...http://www.google.fr/patents/US5317470?utm_source=gb-gplus-shareBrevet US5317470 - Control system including a switching circuit for ensuring proper operation when operating power is removed from a portion of the control system
Control system including a switching circuit for ensuring proper operation ...
