Abstract: A driver circuit for a composite power amplifier configured to operate in at least one Chireix-mode a first and a second sub-amplifier for amplification of an input signal into an output signal is disclosed. An input network of the driver circuit comprises a means configured to provide a first signal which is linearly derivable from the input signal, and a second signal which is non-linearly derivable from the input signal. The input network combines the first signal, at zero degrees phase shift, and the second signal, at 90 degrees phase shift, to obtain a first feeding signal for the first sub-amplifier. Furthermore, the input network combines the first signal, at 180 degrees phase shift, and the second signal, at 90 degrees phase shift, to obtain a second feeding signal for the second sub-amplifier.

Abstract: A connector assembly suppresses electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB). Certain embodiments of the connector assembly include common features such as conductive through-holes on the PCB, and a connector having terminal pins positionable through the conductive through-holes. The first embodiment includes a magnetic wafer positionable between the connector and the PCB. The second embodiment includes a plurality of stackable magnetic wafers positionable in a stack between the connector and the PCB. The third embodiment includes a magnetic cup wafer positionable between the connector and the PCB. The fourth embodiment, combines the cup wafer with the stackable magnetic wafers of the second and third embodiments. Each magnetic wafer includes wafer holes for the terminal pins to pass through. The magnetic wafers are configured to increase inductance and provide effective EMI noise suppression.

Abstract: A connector assembly suppresses electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB). The connector assembly includes a plurality of conductive through-holes on the PCB, a connector, and a magnetic collar. The plurality of conductive through-holes are electrically connected to the electronic circuitry on the PCB. The connector has a plurality of terminal pins extending from a connector surface. The plurality of terminal pins and conductive through-holes may be aligned. The terminal pins are positioned through the conductive through-holes to electrically connect the terminals pins to the electronic circuitry. The magnetic collar surrounds the connector. The magnetic collar may also abut the PCB. The magnetic collar suppresses EMI on voltages propagating through the connector.

Abstract: A dual spring contact assembly having an intermediate component between at least two canted coil springs with opposite canting angle directions for fitment between a first component and a second component. When there is relative displacement between the first and second components, the direction of movement of one of the components relative to one of the canted coil spring can always occur along the canting angle, reducing the friction between coils and component and increasing the life of the slip ring.

Abstract: A horizontal type electrical connector includes a terminal module having an insulative housing with a base and a mating tongue extending forwardly from the base wherein the mating tongue forms opposite first and second mating surfaces. The plurality of contacts are integrally formed within the housing, and including a plurality of first contacts having corresponding contacting sections exposed upon the first surface in a full manner while only a pair of second contacts having corresponding contacting sections exposed upon the second surface at a center region. The second mating surface forms a plurality of protrusions aligned with the corresponding contacting sections of the first contacts in the vertical direction so as to performing dummy contacting sections for providing a balanced force arrangement for the inserted complementary plug connector.

Abstract: A power amplifier circuit includes first and second transistors and a first voltage output circuit. A radio frequency signal is input into a base of the first transistor. The first voltage output circuit outputs a first voltage in accordance with a power supply voltage. The first voltage is supplied to a base or a gate of the second transistor. An emitter or a source of the second transistor is connected to a collector of the first transistor. A first amplified signal generated by amplifying the radio frequency signal is output from a collector or a drain of the second transistor.

Abstract: An improved electrical connector including a latch strike plate, a body having a base, a receiver extending from the base and configured to receive the latch strike plate, an inserter extending from the base, a first electrical connection assembly extending through the body, a second electrical connection assembly extending through the body, an electrical linkage cable assembly connected to the base, the first electrical connection assembly, and the second electrical connection assembly, a latching mechanism partially positioned in the base and the inserter and partially extending from the base and the inserter, and a securing assembly extending in and from the base.

Abstract: A fastening structure including a base pillar, a pair of elastic arms, and a top pillar is provided. The base pillar is assembled to an object, the elastic arms are connected between the top and the base pillars, and a gap is provided between the elastic arms. The top pillar is adapted to stretch or compress the elastic arms when an external force is exerted to reduce or expand the gap. The top pillar and the elastic arms pass through a through hole of a connector when the elastic arms are stretched to reduce the gap to make the connector contact the base pillar. After the force is removed, the gap between the elastic arms is restored to fasten the fastening structure between the elastic arms and the base pillar in a floating state. An electronic assembly and an operating method of the fastening structure are also provided.

Abstract: A peaking amplifier is disclosed. The peaking amplifier includes a driver stage, a final stage, and an interstage matching network. The driver stage has a load impedance and is configured to generate a driver output based on an input signal. The final stage has a final stage input impedance and is configured to generate a peaking output based on the driver output. The interstage matching network is coupled to the driver stage and the final stage. The interstage matching network is configured to transform the final stage input impedance to the load impedance for the driver stage when the peaking amplifier is ON and to provide a short to an input of the final stage when the peaking amplifier is in an OFF state.

Abstract: A preamplifier may have a freeze bit that when set, puts the preamplifier in a static state, which prevents the preamplifier from implementing subsequent programming commands. The freeze state may continue until an unfreeze bit is programmed. In a multiple preamplifier system, preamplifiers can be differently and individually configured over a single interface. Preamplifiers may be released from the static state (frozen) by either programming the unfreeze bit (which can release all of the preamps) or by programming the freeze bit to a “0” state (releases the individual preamp). An inversion control circuit can allow inversion of a control signal to a preamplifier. The inversion control circuit may be enabled and disabled based on a physical conductive connection to a logic high voltage or a logic low voltage. One or more programmable control lines can determine whether the inversion function is activated when the inversion control circuit is enabled.

Abstract: A HVAC unit manufacturing method and a HVAC system are, disclosed herein. In one embodiment, the HVAC system includes: a controller having control board terminals, a parallel wiring harness having a first and a second connection header, the first connection header coupled to the control board terminals, and a switch having terminals. The terminals of the switch including: a pair of functional terminals configured to indicate a status of the switch and a pair of jumpered terminals independent of the pair of functional terminals and internally connected together within the switch, wherein designated combinations of the terminals indicate a circuit configuration for employing the switch in the HVAC system with each of the terminals having a particular design that dictates a specific corresponding connection header be used for each of the designated combinations, wherein a single one of the designated combinations of the terminals corresponds to the second connection header.

Abstract: A radio frequency (RF) power transistor circuit includes a power transistor and a decoupling circuit. The power transistor has a control electrode coupled to an input terminal for receiving an RF input signal, a first current electrode for providing an RF output signal at an output terminal, and a second current electrode coupled to a voltage reference. The decoupling circuit includes a first inductive element, a first resistor, and a first capacitor coupled together in series between the first current electrode of the power transistor and the voltage reference. The decoupling circuit is for dampening a resonance at a frequency lower than an RF frequency.

Abstract: An average power tracking mode power amplifier is disclosed herein. The average power tracking mode power amplifier includes a Power Amplifier (PA), a first Direct Current (DC)-DC voltage converter, and a second DC-DC voltage converter. The PA includes a driver stage configured to be driven by first drive voltage and a main amplification stage configured to be driven by second drive voltage. The first DC-DC voltage converter generates the first drive voltage from power voltage so that the first drive voltage is equal to or higher than the power voltage, and applies the generated first drive voltage to the driver stage. The second DC-DC voltage converter generates the second drive voltage from the power voltage so that the second drive voltage is higher than the first drive voltage, and applies the generated second drive voltage to the main amplification stage.

Abstract: There is disclosed a method of controlling an envelope tracking amplification stage comprising an envelope modulated power supply, the method comprising: determining a shaping function to be applied to an envelope signal for controlling the envelope modulated power supply in dependence on a system linearity objective in a region of operation of the amplifier in which the output power of the amplifier is dependent upon the supply voltage; and determining a pre-distortion function to be applied to an input signal to be amplified in dependence on a further linearity objective of the system, in a region of operation of the amplifier in which the output of the amplifier is dependent upon the input power to the amplifier.

Abstract: The present invention provides an electrical interconnection system comprising: a paddle card comprising a plurality of first contact pads positioned on a first surface of the paddle card and a plurality of second contact pads positioned on an opposite second surface of the paddle card; a first wafer comprising a plurality of first conductors each having a first contact portion; and a second wafer comprising a plurality of second conductors each having a second contact portion; wherein the first wafer and the second wafer are assembled together to have the first contact portion and the second contact portion face each other and be able to form a gap therebetween for accommodating at least part of the paddle card; each first contact portion is adapted to be in electrical contact with a corresponding first contact pad and each second contact portion is adapted to be in electrical contact with a corresponding second contact pad when the paddle card is at least partly accommodated in the gap.

Abstract: A coaxial cable connector comprising a connector body, a dielectric component, and a conductor component is provided. The connector body has a threaded outer surface, a radially protruding head portion, and an altered hex-shaped end portion. The altered hex-shaped end portion and radially protruding head portion surround the first body opening end of the connector body. The connector body further comprises a through-hole having a radially inner protruding end portion on an inner surface of the first connector body end. The dielectric component has a cylindrical center tube, a radially protruding head end portion, and a plurality of flexible snap hooks. The plurality of flexible snap hooks slide along guide passageways of the radially inner protruding end portion of the through-hole, fittably hooking and locking against an annular inner lock back wall thereof. The first conductor component extends through the cylindrical center tube of the dielectric component.

Abstract: An embodiment of an amplifier has a bandwidth defined by low and upper cutoff frequencies. The amplifier includes an input impedance matching circuit and a transistor. The transistor has a gate, a first current conducting terminal coupled to an output of the amplifier, and a second current conducting terminal coupled to a reference node. The input impedance matching circuit has a filter input coupled to an input of the amplifier, a filter output coupled to the gate of the transistor, and a multiple pole filter coupled between the filter input and the filter output. A first pole of the filter is positioned at a first frequency within the bandwidth, and a second pole of the filter is positioned at a second frequency outside the bandwidth. The input impedance matching circuit is configured to filter the input RF signal to produce a filtered RF signal at the filter output.

Abstract: Methods and systems for optimizing amplifier operations are described. The described methods and systems particularly describe a feed-forward control circuit that may also be used as a feed-back control circuit in certain applications. The feed-forward control circuit provides a control signal that may be used to configure an amplifier in a variety of ways.

Abstract: A lever-type connector (10) includes a lever (40) provided with a cam groove (41), a first housing (30) having the lever (40) movably mounted thereon, and a second housing (60) provided to be connectable to the first housing (30). The second housing (60) includes a lever shaft (64) movable along the cam groove (41) according to a movement of the lever (40), a lever fitting portion (72) to which a peripheral edge part of the lever (40) is fit, and a bracket mounting portion (66) disposed behind an entrance space (71) for the lever (40) and provided with a locking claw (67). The locking claw (67) is disposed between the lever shaft (64) and the lever fitting portion (72) when the second housing (60) is viewed from a connecting direction.

Abstract: A dual in-line memory module (DIMM) connector can include a double data rate fourth generation (DDR4) DIMM connector to connect to a DIMM via a lowest notch of the DIMM relative to an electronic component on which the DIMM is located.