A single live line switch circuit includes a single live line connecting end, a switch unit, two wire channels, an on-state power obtaining circuit, an off-state power obtaining circuit, and an energy storage element. The single live line connecting end is connected to an external single live line. The on-state power obtaining circuit is connected to the single live line connecting end. The switch unit includes a fixed connecting end and a movable connecting end, and the fixed connecting end is connected to the on-state power obtaining circuit. The two wire channels are provided with a first connecting end and a second connecting end, respectively, and the movable connecting end of the switch unit is in contact with the first connecting end or the second connecting end. A control method of the single live line switch circuit is provided.

A single live line switch circuit includes a single live line connecting end, a switch unit, two wire channels, an on-state power obtaining circuit, an off-state power obtaining circuit, and an energy storage element. The single live line connecting end is connected to an external single live line. The on-state power obtaining circuit is connected to the single live line connecting end. The switch unit includes a fixed connecting end and a movable connecting end, and the fixed connecting end is connected to the on-state power obtaining circuit. The two wire channels are provided with a first connecting end and a second connecting end, respectively, and the movable connecting end of the switch unit is in contact with the first connecting end or the second connecting end. A control method of the single live line switch circuit is provided.

A switching splitter and method of operating the same comprises a first port, a second port in communication with the first port and a third port in communication with the first port. A switching module is in communication with the second port and the third port. The switching module switches in response to a direct current voltage at the second port. The switching module communicates a control signal from the second port to the first port or from the third port to the first port in response the direct current voltage.

A switching splitter and method of operating the same comprises a first port, a second port in communication with the first port and a third port in communication with the first port. A switching module is in communication with the second port and the third port. The switching module switches in response to a direct current voltage at the second port. The switching module communicates a control signal from the second port to the first port or from the third port to the first port in response the direct current voltage.

Operating a bi-directional double-base bipolar junction transistor (B-TRAN). One example is a method comprising: conducting a first load current from an upper terminal of the power module to an upper collector-emitter of the transistor, through the transistor, and from a lower collector-emitter to a lower terminal of the power module; and then responsive assertion of a first interrupt signal, interrupting the first load current from the lower collector-emitter to the lower terminal by opening a lower-main FET and thereby commutating a first shutoff current through a lower base of the transistor to the lower terminal; and blocking current from the upper terminal to the lower terminal by the transistor.

A controller (3) includes an AC voltage generator (12) that generates first to Nth AC voltages, a DC voltage generator (13) that converts the first to Nth AC voltages into first to Nth DC voltages, respectively, and a driver (14) that turns on and off a switch (1) based on the first to Nth DC voltages. The AC voltage generator (12) includes first to Nth isolation transformers (T1 to TN). The primary windings of the nth and (n+1)th isolation transformers receive an AC source voltage. The nth to first isolation transformers are sequentially connected. The (n+1)th to Nth isolation transformers are sequentially connected. The first to Nth isolation transformers respectively output the first to Nth AC voltages from their respective secondary windings.

A bidirectional bipolar transistor switch arrangement, including: a first bipolar transistor and a second bipolar transistor connected in anti-parallel between a first terminal and a second terminal, a resistor connected to the base of the first bipolar transistor and the second bipolar transistor and to a control terminal, a first diode connected with anode to the first terminal, and a second diode connected with anode to the second terminal, the first diode and the second diode being connected via respective cathodes to a supply terminal. The bidirectional bipolar transistor switch arrangement is able to control the power supply within a daisy chain with low drop voltage.

Operating a bi-directional double-base bipolar junction transistor (B-TRAN). One example is a method comprising: conducting a first load current from an upper terminal of the power module to an upper collector-emitter of the transistor, through the transistor, and from a lower collector-emitter to a lower terminal of the power module; and then responsive assertion of a first interrupt signal, interrupting the first load current from the lower collector-emitter to the lower terminal by opening a lower-main FET and thereby commutating a first shutoff current through a lower base of the transistor to the lower terminal; and blocking current from the upper terminal to the lower terminal by the transistor.

A bidirectional bipolar transistor switch arrangement, including: a first bipolar transistor and a second bipolar transistor connected in anti-parallel between a first terminal and a second terminal, a resistor connected to the base of the first bipolar transistor and the second bipolar transistor and to a control terminal, a first diode connected with anode to the first terminal, a second diode connected with anode to the second terminal, the first diode and the second diode being connected via respective cathodes to a supply terminal.

The bidirectional bipolar transistor switch arrangement is able to control the power supply within a daisy chain with low drop voltage.

In a method for controlling a direct current switch having first and second semiconductor switches capable of being switched off, the first and second semiconductor switches are arranged between first and second terminals to enable conduction of a current with a first polarity through the first semiconductor switch and conduction of the current with a second polarity that is opposite to the first polarity through the second semiconductor switch. One of the first and second semiconductor switches is switched off as a function of a current measurement value.