Abstract: An electrical connector includes a housing, first and second sets of terminals and a spacer. The housing has a first sidewall, a second sidewall spaced apart from the first sidewall and a cavity between the first and second sidewalls. The first set of terminals is disposed in the cavity adjacent to the first sidewall. The second set of terminals is disposed in the cavity adjacent to the second sidewall. The spacer is disposed in the cavity between the first and second sets of terminals.

Abstract: An electrical power connector can include an electrically insulative connector housing, a first plurality of electrical contacts supported by the connector housing, and a second plurality of electrical contacts supported by the connector housing. The first plurality of electrical contacts can be of a first type, and the second plurality of electrical contacts are of a second type and positioned adjacent to the first plurality of electrical contacts. The arrangement of the electrical contact can provide creepage protection for the electrical connector. Further, the electrical contacts can include mating portions that are touch proof.

Abstract: An electrical connector including a housing; electrical contacts connected to the housing; and a shield cover connected to the housing. The shield cover includes a first cover member and a second cover member. The shield cover surrounds the housing. The first cover member includes a first cover member latching section having a first lateral side with inward projecting hooks and an opposite second lateral side with outward projecting hooks. The second cover member has a second cover member latching section with a first lateral side with inward projecting hooks and an opposite second lateral side with outward projecting hooks. The inward projecting hooks of the first cover member latching section is latched to the outward projecting hooks of the second cover member latching section, and the inward projecting hooks of the second cover member latching section is latched to the outward projecting hooks of the first cover member latching section.

Abstract: A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

Abstract: A mine prop includes a first pipe having a first end and a second end, a second pipe having a first end and a second end, and a yield member secured to the second pipe. The second pipe is slidably received in the first pipe. The yield member is configured to yield before the first and second pipes when the mine prop is placed under a predetermined load.

Abstract: A dual operation mode power amplifier is disclosed. In the power amplifier in accordance with an embodiment of the present invention, a bias circuit part can be converted to decrease power consumption. Different from the prior art, performance of the present invention is not reduced in a high power mode, and no additional passive components like inductors or transformers with a large area are necessary to be further added. Furthermore, a tunable impedance matching circuit provides impedances respectively matching impedances of a fully differential amplifier and a single-ended amplifier, thereby improving the performance of the power amplifier.

Abstract: Disclosed herein is a method. A first electrically conductive trace is provided on a substrate. A second electrically conductive trace is providing on the substrate proximate the first electrically conductive trace. A solder mask is provided at the first and the second electrically conductive traces. A portion of the first electrically conductive trace is free of any portion of the solder mask covering thereon.

Abstract: An optoelectrical connector system can include an optical coupler that is configured to be positioned over a photonic device on the PCB. The optoelectrical connector system can further include a connector housing that is configured to be attached to the optical coupler after the optical coupler is positioned over the photonic device, so that the coupler can be aligned and fixed without the housing attached thereto.

Abstract: An electrical terminal includes an electrically conductive monolithic body including a mating end having a base, a contact beam spaced from the base in an upward direction, a side wall that extends from the base to the contact beam, and a spring assist member. The contact beam can be elastically flexible from an initial position whereby the spring assist member is spaced from the contact beam in the upward direction, to a deflected position whereby the contact beam abuts the spring assist member. The electrical is suited for assembly into a connector assembly which includes and inner core and an outer housing.

Abstract: In accordance with an embodiment, an electrical cable can be configured to electrically connect to contact pads that are carried by a substrate. The electrical cable can include at least one, such as a pair, of electrical signal conductors and at least one, for instance a pair, of electrically conductive drain wires. A drain wire in the electrical cable can define a first surface that is configured to face the substrate and a second surface that is opposite the first surface. The drain wire can define a height that is greater than 0.2 mm as measured from the first surface to the second surface along a straight line.

Abstract: Embodiments of the present invention provide high performance and reliable electrical cable connectors and connector assembly. An electrical cable connector according to one embodiment of the present invention includes a housing (110) and terminals (140) disposed in compartments (111) of the housing (110). The housing (110) has a mating face (101) for connecting to a counterpart connector, and each compartment (111) has a mating end (111a) adjacent to the mating face (101) and an entrance (111b) opposite to the mating end (111a). Each terminal (140) is disposed in one of the compartments (111) by being inserted into the compartment (111) from the entrance (111b). A cover (120) is assembled to the housing (110) to block the entrance (111b) of each compartment (111), such that removal of the terminals (140) from the housing (110) through the entrance (111b) is prevented. The cover (120) has openings (126, 128) formed thereon to allow electrical cables (130) to pass through to connect to the terminals (140).

Abstract: A communication system and an IoT system are provided. The IoT system is applicable to a wireless network system including an access point. The IoT system includes a WiFi module and a GPIO device. The WiFi module is configured to connect to the access point. The GPIO device is configured to provide a plurality of wake-up signals to the WiFi module through a GPIO pin. A predetermined time period between any two of wake-up signals is greater than an interval between two delivery traffic indication messages from the access point. The WiFi module includes a timer and a power management unit, the power management unit drains power to transfer the WiFi module from a sleep mode to a normal mode after the timer receives the wake-up signal.

Abstract: An electrical cable assembly includes a plurality of electrical cables, and a plurality of interposers configured to be mounted to a substrate at a first end, and mounted to electrical conductors of the electrical cables at a second end that is offset from the first end. The electrical cable assembly further includes an alignment housing that supports the interposers, and further defines a conduit to receive the drain wires of the electrical cables that are mounted to the substrate.

Abstract: An inductor-less low noise amplifier (LNA) with high linearity is disclosed. The low noise amplifier includes: an input signal stage receiving an input signal; a first amplifier configured to receive the input signal, generate a first amplification signal by amplifying the received input signal, and output the generated first amplification signal, as a first output signal, to a first output terminal; a second amplifier configured to receive the input signal, generate a second amplification signal by amplifying the received input signal, and output the generated second amplification signal, as a second output signal, to a second output terminal; an output signal stage outputting a superimposition signal obtained by superimposing the first output signal and the second output signal; a first resistor feeding back the superimposition signal to the input signal stage; and a switch connecting/disconnecting between the input signal stage and the output signal stage.

Abstract: An electrical connector is disclosed having a multi-piece connector housing. The housing pieces may be configured to fit together with separation between interior surfaces of the separately manufactured housing pieces. This separation selectively introduces pockets of air adjacent portions of the mating contacts within the connector. The packets of air may be preferentially positioned to provide a more uniform impedance along the length of a mating contact. The separation may be introduced near the mating interface of a receptacle connector, for example, to counter the effects of changes in contact geometry at the mating interface.

Abstract: Electrical power contacts (100) are described having a mounting portion (114), a mating portion (102), and a transition region (116) that extends between the mounting portion and the mating portion. The mating portion can define first and second contact blades (104, 106) that are spaced from each other to define a receptacle that can be sized to receive a complementary electrical power contact (200). The transition region can be sized and shaped so as to transmit electrical power between the mounting portion and the mating portion.