TH17932A - A control system that includes switching circuits to provide optimal operation when the operating power is cut off from the control system. - Google Patents

Abstract

The arrangement to ensure that the appropriate control level for the controlled unit is maintained when the supply voltage is shifted from the control unit of the control system consists of a switching circuit which connects the control unit and the controlled unit. The controlled unit transmits the control signal generated by the control unit to the controlled unit when the supply voltage occurs and responds to the absence of the supply voltage. For isolation of the control unit's output and input points, in this manner, the current generated by the protection circuit within the control unit when the supply voltage is shifted from the controlled unit will not negatively affect the operation of the controlled unit.

Claims (2)

1. In electronic devices which are switched on and off This device contains A regulated unit that receives the first source voltage even when the equipment is turned off and contains a control device for controlling the specific operation of the regulated unit in response to a connected control signal. With the entry point of the control device The control unit which receives the secondary supply voltage. And generate a control signal at the exit point when the device is turned on; And a switch for connecting the control signal generated at the output point of the control unit to the control device's entry point when the second source voltage occurs. And for separating the control device's entry point from the control unit exit when the second source voltage is lost. A switch that responds to the occurrence of a second source voltage for connecting the control signal generated at the output point of the control unit to the input of the control device. And responds to the absence of a secondary supply voltage for the separation of the control device entry point from the control unit exit point. 2. In electronic devices which are switched on and off This device contains A regulated unit that receives the primary supply voltage even when the equipment is turned off and which consists of a control device which also receives the primary source voltage. Even if the device is turned off, and this controls the specific operation of the regulated device in response to a control signal connected to the input point of the control device. A control unit which receives a secondary supply voltage only when the device is switched on. And generates a control signal at the output point of the control unit only when the device is switched on and switches for connecting the control signal generated at the exit point of the control unit to the entry point of the control device in response to a duty voltage source. Pay second Each for separating the control device's entry point from the control unit's exit point in response to a second failure of the supply voltage. And switches with a first and second point And a control point for controlling the conductivity of the switch between the first and second sequence. The force sequence point is connected to the exit point of the control unit. The second point is connected to the entry point of the control device. And the aforementioned second source voltage is connected to the said control point.