Abstract: A transient voltage suppressing (TVS) device including a first silicon-controlled rectifier and a voltage clamp having a first terminal and a second terminal. The first terminal is connected to a cathode of the first silicon-controlled rectifier.

Abstract: A transient voltage suppressing device includes a plurality of fingers arranged laterally along a major surface of an epitaxial layer. The plurality of fingers includes fingers of a first type and fingers of a second type. The first type and second type of fingers each include a silicon controlled rectifier (SCR) region and a junction diode region. The plurality of fingers of the second type are conductively coupled together by a second metal layer disposed over top a first metal layer and electrically insulated from the first metal layer. The first metal layer conductively couples the SCR region and junction diode region of the first type of finger.

Abstract: Provided are a three-dimensional carbon-based copolymerization composite, and a preparation method and use thereof.

Abstract: The present disclosure provides a method for two-phase partitioning production of a medium-chain fatty acid (MCFA) by dry anaerobic digestion. In the present disclosure, due to a slow heat transfer of the dry anaerobic digestion, a same dry anaerobic digestion device is naturally divided into two phases, and the MCFA is synthesized while producing electron acceptors and electron donors in the same dry anaerobic digestion device. Meanwhile, the dry anaerobic digestion device is provided with a high-efficiency decomposing microbial inoculant on an upper part and inoculated with sludge having a carbon chain extension function on a lower part. In this way, a material residence time is regulated, and cycles of hydrolytic acidification and carbon chain extension are shortened, thereby achieving the high-value conversion of agricultural waste while increasing a conversion rate of organic acids in the dry anaerobic digestion.

Abstract: Provided are a three-dimensional carbon-based copolymerization composite, and a preparation method and use thereof.

Abstract: The present disclosure provides a method for two-phase partitioning production of a medium-chain fatty acid (MCFA) by dry anaerobic digestion. In the present disclosure, due to a slow heat transfer of the dry anaerobic digestion, a same dry anaerobic digestion device is naturally divided into two phases, and the MCFA is synthesized while producing electron acceptors and electron donors in the same dry anaerobic digestion device. Meanwhile, the dry anaerobic digestion device is provided with a high-efficiency decomposing microbial inoculant on an upper part and inoculated with sludge having a carbon chain extension function on a lower part. In this way, a material residence time is regulated, and cycles of hydrolytic acidification and carbon chain extension are shortened, thereby achieving the high-value conversion of agricultural waste while increasing a conversion rate of organic acids in the dry anaerobic digestion.

Abstract: The present disclosure provides a method for two-phase partitioning production of a medium-chain fatty acid (MCFA) by dry anaerobic digestion. In the present disclosure, due to a slow heat transfer of the dry anaerobic digestion, a same dry anaerobic digestion device is naturally divided into two phases, and the MCFA is synthesized while producing electron acceptors and electron donors in the same dry anaerobic digestion device. Meanwhile, the dry anaerobic digestion device is provided with a high-efficiency decomposing microbial inoculant on an upper part and inoculated with sludge having a carbon chain extension function on a lower part. In this way, a material residence time is regulated, and cycles of hydrolytic acidification and carbon chain extension are shortened, thereby achieving the high-value conversion of agricultural waste while increasing a conversion rate of organic acids in the dry anaerobic digestion.

Abstract: A monitor for monitoring the conditions of and around and under a manhole cover senses current conditions of the manhole cover and enables wireless self-reporting of such conditions at intervals and upon certain emergency situations arising. The monitor of the manhole cover includes a shell, a cover plate, and a base. The cover plate is detachably assembled with the shell. The base connects the shell with the manhole cover. The base includes a magnet to which the manhole cover is strongly attracted. The monitor is held to the manhole cover by the magnet. A mounting operation of the monitor is simple, requiring only placement by hand, and a mounting time is saved.

Abstract: A transient voltage suppressing device includes a plurality of fingers arranged laterally along a major surface of an epitaxial layer. The plurality of fingers includes fingers of a first type and fingers of a second type. The first type and second type of fingers each include a silicon controlled rectifier (SCR) region and a junction diode region. The plurality of fingers of the second type are conductively coupled together by a second metal layer disposed over top a first metal layer and electrically insulated from the first metal layer. The first metal layer conductively couples the SCR region and junction diode region of the first type of finger.

Abstract: A housing assembly for an electronic device, which allows the installation of a larger and more powerful battery includes a first housing and a second housing. The second housing is received in the first housing. A groove is formed on a surface of the first housing facing the second housing. The second housing includes a first side plate, a second side plate facing to the first side plate, a bottom plate, and a fastener. The first side plate and the second side plate are disposed on sides of the bottom plate to form a receiving space. The first side plate and the second side plate are connected to the first housing. The fastener is disposed on the first side plate or the second side plate, and received in the groove. An electronic device using the housing assembly is also provided.

Abstract: A housing assembly for an electronic device, which allows the installation of a larger and more powerful battery includes a first housing and a second housing. The second housing is received in the first housing. A groove is formed on a surface of the first housing facing the second housing. The second housing includes a first side plate, a second side plate facing to the first side plate, a bottom plate, and a fastener. The first side plate and the second side plate are disposed on sides of the bottom plate to form a receiving space. The first side plate and the second side plate are connected to the first housing. The fastener is disposed on the first side plate or the second side plate, and received in the groove. An electronic device using the housing assembly is also provided.

Abstract: A waterproof button for an electronic device includes a button portion and a waterproof portion. The button portion includes an operating portion, a connecting portion, and a pressing portion. The waterproof portion includes a positioning portion, a sleeve, and a receiving portion. The positioning portion defines a through hole to allow the connecting portion to pass through. The sleeve is connected to the positioning portion to receive the connecting portion, the receiving portion is connected to the sleeve to receive the pressing portion. A surface of the positioning portion forms a fixing surface. When the waterproof button is mounted to the electronic device, the fixing surface is fixed to the electronic device. An electronic device using the waterproof button is also described.

Abstract: A waterproof button for an electronic device includes a button portion and a waterproof portion. The button portion includes an operating portion, a connecting portion, and a pressing portion. The waterproof portion includes a positioning portion, a sleeve, and a receiving portion. The positioning portion defines a through hole to allow the connecting portion to pass through. The sleeve is connected to the positioning portion to receive the connecting portion, the receiving portion is connected to the sleeve to receive the pressing portion. A surface of the positioning portion forms a fixing surface. When the waterproof button is mounted to the electronic device, the fixing surface is fixed to the electronic device. An electronic device using the waterproof button is also described.

Abstract: Apparatus and methods for transceiver interface overvoltage clamping are provided. In certain configurations, an interface device includes a first p-type well region and a second p-type well region in an n-type isolation structure. Additionally, the clamp device includes a first p-type active region and a first n-type active region in the first p-type well region and electrically connected to a first terminal of the clamp device. Furthermore, the clamp device includes a second p-type active region and a second n-type active region in the second p-type well region and electrically connected to a second terminal of the clamp device. The n-type isolation structure is in a p-type region of a semiconductor substrate, and electrically isolates the first and second p-type well regions from the p-type substrate region. The clamp device further includes a blocking voltage tuning structure positioned between the first and second n-type active regions.

Abstract: Junction-isolated blocking voltage devices and methods of forming the same are provided. In certain implementations, a blocking voltage device includes an anode terminal electrically connected to a first p-well, a cathode terminal electrically connected to a first n-well, a ground terminal electrically connected to a second p-well, and an n-type isolation layer for isolating the first p-well from a p-type substrate. The first p-well and the first n-well operate as a blocking diode. The blocking voltage device further includes a PNPN silicon controlled rectifier (SCR) associated with a P+ region formed in the first n-well, the first n-well, the first p-well, and an N+ region formed in the first p-well. Additionally, the blocking voltage device further includes an NPNPN bidirectional SCR associated with an N+ region formed in the first p-well, the first p-well, the n-type isolation layer, the second p-well, and an N+ region formed in the second p-well.

Abstract: Apparatus and methods for transceiver interface overvoltage clamping are provided. In certain configurations, an interface device includes a first p-type well region and a second p-type well region in an n-type isolation structure. Additionally, the clamp device includes a first p-type active region and a first n-type active region in the first p-type well region and electrically connected to a first terminal of the clamp device. Furthermore, the clamp device includes a second p-type active region and a second n-type active region in the second p-type well region and electrically connected to a second terminal of the clamp device. The n-type isolation structure is in a p-type region of a semiconductor substrate, and electrically isolates the first and second p-type well regions from the p-type substrate region. The clamp device further includes a blocking voltage tuning structure positioned between the first and second n-type active regions.

Abstract: An apparatus for transceiver signal isolation and voltage clamp from transient electrical events includes a bi-directional protection device comprising a bipolar PNPNP device assembly, a first parasitic PNPN device assembly, and a second parasitic PNPN device assembly. The bipolar PNPNP device assembly includes an NPN bi-directional bipolar transistor, a first PNP bipolar transistor, and a second PNP bipolar transistor, and is configured to receive a transient voltage signal through first and second pads. The first and second pads are electrically connected to the PNPNP device assembly through emitters of the first and second PNP bipolar transistors. The bipolar PNPNP device assembly is electrically connected to a first parasitic PNPN device assembly comprising a parasitic PNP bipolar transistor and a first parasitic NPN bipolar transistor.