A transceiving circuit includes a first transmitting circuit, a first receiving circuit, a first switching circuit and a processing circuit. The first transmitting circuit includes a first inductor and a second inductor, wherein the second inductor is coupled between a first node and a second node, and an end of the first inductor is coupled to the second node. The first receiving circuit is coupled to a third node. The first switching circuit is configured to conduct or block the first node and the third node. When the transceiving circuit is operated in a transmitting mode, the processing circuit is configured to control the first switching circuit to disconnect the first node with the third node. When the transceiving circuit is operated in a receiving mode, the processing circuit is configured to control the first switching circuit to connect the first node with the third node.

A dual transient surge and communication protection device, which can have less than 5 nanosecond response time and can provide communication and power transient surge protection for field instrumentation and be configured for operating under multiple communication protocols. The dual transient surge and communication protection device can have a positive power and communication terminal, a negative power and communication terminal, a grounding terminal, a first silicon avalanche diode array, a second silicon avalanche diode array, a first non-polar wire, a second non-polar wire, a grounding wire and a unit viability wire. The device provides protection from 4 milliamps to 20 milliamps of power and communication signals for field instruments.

A system is provided for maintaining a safe operating area while also providing a suitable forward bias voltage to drive a laser diode. The system can monitor a voltage that is applied to a laser diode driver using a threshold that is based on the fabrication process of the laser diode driver. For example, a system can utilize a first threshold for a laser diode driver that is fabricated utilizing a 10 nm process and utilize a second threshold for another laser diode driver that is fabricated utilizing a 20 nm process. The threshold can also be based on a color of the laser or a desired operation mode. The system can monitor a voltage applied to a laser diode using different thresholds while controlling a bleed current to ensure that the laser diode is forward biased while mitigating the risk of silicon breakdown of the laser diode driver.

An AC disconnect switch with integral surge protection. The intrinsic pullout head of the AC disconnect switch embodies a surge protection device, thereby eliminating the need for an extrinsic surge protection device.

The present application provides a low-leakage static electricity releasing circuit, a display panel and a display device. T1, T2 and T3 that are connected in series are taken as a first group. T4, T5 and T6 that are connected in series are taken as a second group. The first group and the second group serve as releasing paths for static electricity with negative voltages and static electricity with positive voltages, respectively. When one of the groups releases the static electricity, the other group has small current leakage. This reduces the affection of a static electricity releasing circuit on the voltage of a signal line due to the current leakage, and is applicable to static electricity releasing for foldable areas of a flexible, foldable display screen.

An AC disconnect switch with integral surge protection. The intrinsic pullout head of the AC disconnect switch embodies a surge protection device, thereby eliminating the need for an extrinsic surge protection device.

A surge suppression device has a resistive element, a capacitor electrically connected to the resistive element, a terminal electrically connected to the opposite side of the resistive element to the side connected to the capacitor, a fixing metal bracket to be fixed to a fixing target, and a mold resin to mold the resistive element, the terminal and the fixing metal bracket. The capacitor is located away from the mold resin.

A power receiving unit of the disclosure includes: a power receiving section that receives power transferred from a power transfer unit in a contactless manner; a protection circuit section that varies a receiving power voltage of the power received by the power receiving section; and a control section that controls an operational state of the protection circuit section to a plurality of statuses on the basis of a plurality of thresholds.

Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (“DC”) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

Embodiments provide an electrostatic discharge (ESD) protection circuit and an electrostatic discharge method. The ESD protection circuit includes: a pulse detection unit (100), a discharge transistor (300), a feedback delay unit (200), and a processing unit (400). A first terminal of the pulse detection unit (100) is connected to a first pad (101), a second terminal of the pulse detection unit (100) is connected to a second pad (102), and an output terminal of the pulse detection unit (100) is configured to output a detection result signal. A gate of the discharge transistor (300) is connected to the output terminal of the pulse detection unit (100), a drain of the discharge transistor (300) is connected to the first pad (101), and a source of the discharge transistor (300) is connected to the second pad (102). The feedback delay unit (200) includes a PMOS transistor (Mp) and an NMOS transistor (Mn).