An arc suppression pre-charge circuit includes a source for providing energy to a load and a main contactor selectively closed to provide energy from the source to the load, wherein the main contactor provides an alternate current path from the source to the load and bypasses a pre-charge branch of the circuit when the main contactor is closed. The pre-charge branch includes a voltage-controlled resistor and a control circuit configured to control a resistance of the voltage-controlled resistor.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

The present disclosure relates to a polarity correction circuit. The polarity correction circuit may include a detection module and a switching module. The detection module may be configured to detect a polarity of a DC voltage transmitted to a powered device and generate one or more control signals based on the polarity of the DC voltage. The switching module may be configured to receive the one or more control signals and a data signal transmitted from the powered device. The switching module may be further configured to adapt a polarity of the data signal based on the one or more control signals such that the polarity of the data signal is accordant with the polarity of the DC voltage.

A mains-powered module and a driving method are provided, in which the voltage and/or frequency of received mains power is detected. A disabling circuit is used to disable a driver circuit if the mains power profile characteristics do not match those for which the module has been designed.

A mains-powered module and a driving method are provided, in which the voltage and/or frequency of received mains power is detected. A disabling circuit is used to disable a driver circuit if the mains power profile characteristics do not match those for which the module has been designed.

An electronic circuit arrangement may include first and second electric connections connectable to first and second electronic devices, respectively. A first electric conduction path may connect the first and second electric connections, and a second electric conduction path may connect a tee point provided in the first electric conduction path to an electric ground connection. First and second switching elements may be provided in the first and second electric conduction paths, respectively, between the tee point and the respective electric connection. Each switching element may switch between an open state, in which the switching element may interrupt the respective electric conduction path, and a closed state. In response to connecting the second electronic device to the second electronic connection, the second switching element may switch to the open state, and the first switching element to the closed state only after the second switching element is already in the open state.

An electronic circuit arrangement may include first and second electric connections connectable to first and second electronic devices, respectively. A first electric conduction path may connect the first and second electric connections, and a second electric conduction path may connect a tee point provided in the first electric conduction path to an electric ground connection. First and second switching elements may be provided in the first and second electric conduction paths, respectively, between the tee point and the respective electric connection. Each switching element may switch between an open state, in which the switching element may interrupt the respective electric conduction path, and a closed state. In response to connecting the second electronic device to the second electronic connection, the second switching element may switch to the open state, and the first switching element to the closed state only after the second switching element is already in the open state.

A protection circuit includes: a high-side switch connected to a power terminal to which a predetermined power supply voltage VBB is supplied from an onboard battery; and an NMOS transistor MT1 connected to the high-side switch and configured to prevent an electrical conduction to the high-side switch when the onboard battery is reverse-connected to the power terminal, wherein a semiconductor integrated circuit is protected from a breakdown due to the reverse connection of the external power supply. A semiconductor integrated circuit apparatus includes the above-mentioned protection circuit configured to protect a semiconductor integrated circuit connected between the power terminal and the ground terminal, from an electro-static discharge breakdown. The protection circuit is connected to the clamp circuit unit inserted between the power terminal and the ground terminal, and is configured to protect the clamp circuit unit from a breakdown when the external power supply is reverse-connected.

A protection circuit is provided. A control circuit receives an input voltage. In a case that the input voltage is lower than a negative threshold voltage, the control circuit outputs a first control voltage to a surge bleeder circuit through a first output end of the control circuit, to control the surge bleeder circuit to discharge the input voltage and output a first bleeder current. In a case that the input voltage is higher than a positive threshold voltage, the control circuit outputs a second control voltage to the surge bleeder circuit through a second output end of the control circuit, to control the surge bleeder circuit to discharge the input voltage and output a second bleeder current.

An electrical receptacle contains contacts, at least one contact for electrical connection to a hot power line and at least one contact for a neutral power line. A controlled switch, such as a TRIAC, is connected in series relationship between the contact and the hot power line. One or more sensors are provided which detect signals of the hot power line and/or the neutral power line. The processor provides activation or deactivation control to the controlled switch in response to the detected signals that are indicative of conditions relative to the first and second contacts.