Abstract: Transceiver circuitry (10, 200) for use in a GBIC module uses readily available off the shelf components to satisfy the specifications of the GBIC standard. In both passive and active modules, a voltage divider (98) and parallel transistors (94, 96, 100) are utilized to insure that the differential voltage of the received differential signal is at an acceptable level. In active modules, a diode cross over quad (84) is utilized to extend the input range of a low input differential receiver (78) and a coaxial cable driver (60) designed to drive 50 ohms is utilized to drive 150 ohms.

Abstract: The invention is an optical ADD/DROP filter suitable for dense wavelength division multiplexing/de-multiplexing. It comprises an optical bench having a longitudinal V-groove into which the optical components of the ADD/DROP filter are passively aligned and bonded. The bench further includes first and second pairs of opposed, spaced, vertical members at each end between which a fiber array block is inserted. In the method of constructing the ADD/DROP filter, an interference filter is bonded to a first collimating lens. Then, the first collimating lens with the interference filter attached thereto and a second collimating lens are placed in the V-groove of the bench where they are passively aligned. The two collimating lenses are then bonded to the bench. Fiber array substrates are inserted between the pairs of opposed, spaced, vertical members and a UV transparent block is inserted on top of each fiber array between the corresponding pair of opposed, spaced, vertical members.

Abstract: A coaxial connector (10) for a coaxial cable (100) having a corrugated outer conductor (108), including one which is helically corrugated. An adapter (40) of the connector can include a crimpable sleeve (44) within which is a bushing (70) initially having an axial slot (72) of selected dimension. The inner surface (74) of the bushing is fluted defining ridges and grooves (for cable of annular corrugation), or a continuous helical ridge (76) and associated groove (78) defining a thread of corresponding pitch, and general inner diameter permitting cable insertion. Upon full threading of the cable end into adapter (40), crimp sleeve (44) is crimped thus closing axial slot (72) and stopping the crimp process to achieve a minimum desired inner diameter. The adapter may be a discrete subassembly and securable to a forward connector portion in modular fashion by complementary threaded flanges (32,46).

Abstract: The present invention provides an optical interconnection system capable of connecting a plurality of optical array connectors between assemblies. The optical array connectors are arranged to minimize the board real estate occupied by the assembly. Safety features are provided for preventing light from escaping in both the mated and unmated condition.

Abstract: A duplex fiber optic splice has a fiber-receiving element, two clamping elements covering opposite faces of the fiber-receiving element, and a spring element. A bearing key may be inserted into a bearing channel in the fiber-receiving element and rotated resulting in resilient disengagement of each of said clamping faces from said fiber-receiving element face. The resilient disengagement of the clamping elements are independent of each other. The splice assembly may be used alone or in conjunction with an array ferrule, pre-terminated with a fiber stub, and a housing to provide an adhesiveless field terminable connector.

Abstract: A fiber optic connector utilizing a fiber array ferrule 20 has a housing 1 with an internal geometry that provides transverse alignment of the ferrule relative to the housing 1 when the connector is in an unmated condition and permits transverse displacement of the ferrule relative to the housing when the connector is in a mated condition. This structure advantageously permits proper pre-mating alignment with a mating connector ferrule or other optical device while also improving isolation of the ferrule from external loads imposed on the housing 1 when the connector is in a mated condition.

Abstract: The present invention improves the durability of a card connector by providing a card-holding structure which does not have resilient parts. Ribs (30) and grooves (32) are formed at corresponding positions in opposite inside surfaces (6a, 6b) of a rear end portion of a card-receiving slot (6) of a housing (2) to accommodate a card (C) inside housing (2). An upper surface of the inserted card extends into the grooves (32) by the ribs (30), so that the card is held between the ribs (30) and grooves (32).

Abstract: A power transistor (2) circuit for increasing the gain of an amplified RF signal has a power transistor (2), a voltage bias circuit biasing the power transistor 2, the voltage bias circuit having a peak detector (12) and a source of voltage (9) supplying respective outputs to a summer (13), and the summer (13) supplying the sum of outputs of the peak detector (12) and the source of voltage (9) to increase the bias of the power transistor (2) and provide an increased gain upon detection of an RF signal peak.

Abstract: An electrical connector assembly (1) for establishing a mated electrical connection with a plug-in unit (2), has an electrical connector (5) mounted on rails (16), and a resilient spring mechanism (19) urged in compression in response to movement of the connector (5) rearwardly to realign its position when mated with an inaccurately aligned plug-in unit (2).

Abstract: Transceiver circuitry (10) for use in a GBIC module uses readily available off the shelf components to satisfy the specifications of the GBIC standard. A diode cross over quad (84) is utilized to extend the input range of a low input differential receiver (78). A voltage divider (98) and parallel transistors (94, 96, 100) are utilized to insure that the differential voltage of the received differential signal is at an acceptable level. A coaxial cable driver (60) designed to drive 50 ohms is utilized to drive 150 ohms.

Abstract: The present invention provides a card edge electrical connector which makes it possible to achieve reliable grounding of a daughter board to a mother board via latch members thereof. Card edge connector (1) is equipped with an insulating housing (10), which is to be attached to a mother board (50) and which has a daughter board-accommodating recess (11) that extends in the direction of length thereof, and metal latch members (30), which are disposed in the vicinity of end portions of the housing (10) with respect to the direction of length of the housing and which hold a daughter board (60) at a second angle when the daughter board (60) is rotated to the second angle after being inserted into the daughter board-accommodating recess (11) at a first angle. The latch members (30) are connected to a ground path of the mother board (50).

Abstract: An amplifier (1) of improved linearity has a predistortion, bipolar junction device (4), and a transistor (2) on an input side of the amplifier (1), the bipolar junction device (4) being smaller in size than the transistor (2), and having its bipolar junction of opposite polarity with that of the transistor (2), to cancel distortion in an output of the first stage transistor (2).

Abstract: The present invention provides a PC card connector which has a small number of parts, and which makes it possible to obtain good operating characteristics and a low-operating force by means of a relatively simple structure. A guide plate assembly (70) of the PC card connector has a guide plate (32) which has guide grooves (80, 84) and a circular cam groove (82); furthermore, the guide plate assembly (70) also has pressing-bar assemblies (72a, 72b) which are disposed on both sides of the guide plate 32. Each of the pressing-bar assemblies (72a, 72b) has a swinging plate (76) which is pivot mounted on a pin (74) in a front portion. Pins (74, 77) and projection (89) of the pressing-bar assembly (72a) respectively slide along a guide groove (80), circular cam groove (82) and guide groove (84) of the guide plate (32) in accordance with the operation of the pressing-bar assembly (72a).

Abstract: A retention member (40) for a card edge connector (4) is provided for securing a printed circuit card (6) in the connector. The retention member is formed as a spring clip having free ends (42) secured to releasably attached to ends of the electrical connector. Tabs (44) are received in notches (32) to further secure the assembly. Slots (48) are formed in the spring clip to receive corners of the printed circuit card. The spring clip may have bowed portions to further strengthen the retention of the printed circuit card. The spring clip is released from the connector by inserting a tool into lateral tool slots (13).

Abstract: An electrical connector for coaxial cable having at least one contact with a contact region for connection to a mating contact and a connection region for connection to a coaxial cable, wherein the contact includes a peripheral groove; a contact-securing sleeve can be pushed onto the contact from an end face that has at least one latching arm which latches in the groove and at least one further latching element; and a casing with at least one receiving chamber for receiving the contact with the contact-securing sleeve, wherein the latching element of the contact-securing sleeve latches with a mating latching element of the casing and the receiving chamber holds the latching arm in the latched position.

Abstract: The invention is directed to a dielectric member interposed between two electrical components which have different coefficients of thermal expansion (CTEs). The dielectric member has conductive traces for electrically connecting the electrical components. The traces may be joined by solder balls to a printed circuit board. The dielectric member may include reservoirs for locating the solder balls and receiving solder after reflow of the solder balls. Adhesive layers may be used for bonding the traces to the dielectric member. The dielectric member is made of a material having a selected CTE value which minimizes the CTE mismatch at the electrical interface and effectuates absorption of the thermal expansion and contraction of the system. Stresses induced by thermal expansion and contraction at the electrical interface are thereby reduced, preventing problems such as fractured solder joints.

Abstract: The present invention provides a compact latch-equipped connector, which allows accurate accommodation and holding of circuit boards, and which can insure stable holding of circuit boards therein. The latch-equipped connector has metal latch members (20) in positions at both ends of a long, slender housing (11). The latch members (20) have board-engaging sections (31) for engaging with recesses of the circuit board as it is pivoted into a connected position in order to prevent the circuit board from slipping out, and board-holding sections (32) for holding the circuit board inside the housing. The board-holding sections (32) have inclined portions (36) effecting smooth accommodation of the circuit board in the connector. Board-positioning sections (26) are disposed in positions removed from the board-engaging sections (31), and projections (37) are disposed on upper ends of the board-engaging sections (31).

Abstract: A card connector provides for reliable grounding and, at the same time, makes it possible to simplify the mounting, maintenance and servicing operations. Card connector (10) comprises a main body (11) including a dielectric housing (13) accommodating multiple electrical contacts (12) and a grounding member (14) that is fabricated separately from the main body (11) and is secured thereto. The grounding member (14) has tabs (17) that electrically connect with an outer surface of a card inserted in the card connector (10) and connecting sections (16), the purpose of which is to electrically connect with electrical circuitry of a circuit board. The grounding member (14) can be latchably attached to the main body (11) that is mounted to the circuit board (100), and if necessary, it can be removed, thus providing access to connecting sections (12a) of electrical contacts (12).

Abstract: A Balun assembly has a signal conductor (2) on the balanced side of a Balun, the signal conductor (2) being joined to a microstrip RF launch area 7 on a circuit board 6, the signal conductor (2) having a bend of axial orientation for lower cost, reliability, avoiding contact with a ground circuit path (9), being more suited for higher volume manufacturing, that distributes thermal expansion and contraction thereof substantially throughout to lessen stress at a junction of the signal conductor (2) and the RF launch area (7), and the signal conductor (2) being of minimum length and of smooth and even curvature to lessen impedance mismatch at the junction.

Abstract: An electrical cable assembly 1 comprising: a housing 2, electrical contacts 3 in the housing 2 connected to a circuit board 4, multiple conductors 5 of an electrical cable 6 connected to the circuit board 4, signal conditioning circuitry 7 on the circuit board 4, the circuitry 7 being interposed between the electrical contacts 3 and the conductors 5, and an insulating holder 8 mounted on the circuit board 4, the contacts 3 extending on the holder 8, and the holder 8 being mounted in a cavity in the housing 2.