Provided are, among other things, systems, apparatuses, methods and techniques for driving a differential transmission line and an associated differential load. One such apparatus includes an input data line; an output data line; positive and negative supply rails; a pair of source termination resistors coupled to the positive supply rail; a first pair of n-channel transistors coupled to the source resistors and to the output data line; and a second pair of n-channel transistors coupled to the output line and to the negative supply rail.

A first current output circuit transmits a first current to a channel selection circuit. The channel selection circuit selects a transmission channel for the first current based on a control signal, and transmits the first current to an output stage circuit over the transmission channel. Further, the output stage circuit outputs a second current based on the first current, such that the gate driver circuit drives a switch transistor to be turned on or turned off. Since one control circuit is provided in the channel selection circuit, hardware in the gate driver circuit is reduced to lower the cost of the gate driver circuit. In addition, since one control circuit is provided, the number of voltage sources arranged inside the control circuit is also one to reduce static power consumption of the control circuit, such that power consumption of the gate driver circuit is reduced.

Embodiments of the present disclosure relate to a method, apparatus for operating a conduction assembly, a start device, and a computer-readable medium. The conduction assembly is coupled between an AC power supply and an inductive load, and comprises a first switch device and a second switch device which are in anti-series connection, the first switch device comprises a first body diode in anti-parallel connection with the first switch device, and the second switch device comprises a second body diode in anti-parallel connection with the second switch device. The method comprises: conducting the conduction assembly at a first conduction angle in a first cycle; conducting the conduction assembly in a second cycle at a second conduction angle that is greater than the first conduction angle, wherein in the first cycle and second cycle, a turn-off timing of the first switch device or the second switch device in anti-parallel connection with the first body diode or second body diode having a conduction direction the same as a current direction is determined based on the current flowing through the conduction assembly. The method proposed here may reduce the power loss of the soft start circuit.