Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig has at least one through hole. A router support plate is disposed above and removably attachable to the first and second side jigs. A router aperture is disposed through a router support plate thickness.

Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig has at least one through hole. A router support plate is disposed above and removably attachable to the first and second side jigs. A router aperture is disposed through a router support plate thickness.

Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig comprises a plurality of through holes. A template spacer jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the template spacer jig comprises a spacer aperture disposed through a template spacer thickness. A first and second pocket templates are removably attachable and disposed onto the template spacer jig. A router support plate is disposed onto either the first or second pocket templates.

Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig comprises a plurality of through holes. A template spacer jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the template spacer jig comprises a spacer aperture disposed through a template spacer thickness. A first and second pocket templates are removably attachable and disposed onto the template spacer jig. A router support plate is disposed onto either the first or second pocket templates.

Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig comprises a plurality of through holes. A template spacer jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the template spacer jig comprises a spacer aperture disposed through a template spacer thickness. A first and second pocket templates are removably attachable and disposed onto the template spacer jig. A router support plate is disposed onto either the first or second pocket templates.

Abstract: A machining tool assembly for manufacturing a firearm lower receiver includes a first and second side jig which are configured to be disposed on opposite sides of the firearm lower receiver and configured to removably attach to one another securing the firearm lower receiver therebetween. A drill block jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the drill block jig comprises a plurality of through holes. A template spacer jig is removably attachable to the first and second side jigs disposed above the top surface of the firearm lower receiver, wherein the template spacer jig comprises a spacer aperture disposed through a template spacer thickness. A first and second pocket templates are removably attachable and disposed onto the template spacer jig. A router support plate is disposed onto either the first or second pocket templates.

Abstract: An analog transmit side crosstalk cancellation system is disclosed which is located at or near the connector of a communication channel, cable, or backplane. When configured as a connector, multiple signal paths are provided within the cancellation system. Input nodes and output nodes provide access into the connector of a received signal and out of the connector for processed signals. The crosstalk canceller comprises a delay, a filter, and an amplifier. These elements operate in conjunction to generate crosstalk cancellation signals. For a particular received signal, cancellation signals are combined therewith from one or more adjacent channels. The crosstalk cancellation system may be configured as part of a connector or an intermediary device between the communication device or card and conductors. The connector may be attached to the communication device or as part of the cable.

Abstract: Various systems and methods for automatic data rate detection are provided. In one embodiment, a system is provided that includes a clock and data recovery circuit embodied in a first integrated circuit, the clock and data recovery circuit being configured to re-clock a data stream. The system also includes an automatic rate detection system embodied in a second integrated circuit, where the first integrated circuit is in data communication with the second integrated circuit. Also, the automatic rate detection system is configured to determine a data rate of the data stream upon identifying a transition in the data rate of the data stream based upon the state of the at least one status flag received from the clock and data recovery circuit.

Abstract: A method and apparatus is disclosed for incorporating secondary data for transmission as part of or concurrently with network data. In one embodiment, the secondary data comprises communication system data for use in controlling or monitoring a communication system. In one example embodiment, the secondary data is utilized to control the transmit timing of the network data to thereby jitter modulate the secondary data into the transmission of the network data. By monitoring the timing variation, or jitter, of the received network data signal, the secondary data may be recovered. In one embodiment, the secondary data is encoded to reduce the amount of time variation, i.e., jitter, that occurs when transmitting the network data. Decoding may occur upon reception of the time adjusted network data signal. In one embodiment, the encoding comprises CDMA type encoding utilizing one or more orthogonal codes.

Abstract: A method and apparatus for signal amplification and decision device operation on a signal which has a magnitude, peak value, or other average power that varies over time. In general, a peak detector detects the peak value of a received signal and responsive to the peak value, selectively enables a decision device when the signal is amplified to increase decision device accuracy. The decision may occur before the amplification forces the signal into saturation. Multi-stage amplification in combination with controlled switching or multiplexing may be utilized to selectively amplify the signal and selectively initiate decision device operation. The peak detector value may also control signal amplification levels in a multi-stage amplifier. Responsive to the peak value, a switch, which receives as its input the output from one or more amplifier stages, may be controlled to output the signal after a desired amount of amplification.

Abstract: A method and apparatus is disclosed for reducing the error rate in a received signal by determining and establishing an optimal slice point for a decision device, or optimal operational parameters. In one embodiment, a processor monitors a received signal to determine signal characteristics, such as a peak signal level or phase value. A table look-up operation may occur in a data table or other processing may occur and, based on the signal characteristics, an optimal slice point may be determined. In one embodiment the look-up operation may also reveal one or more optimal operational parameters that, if adopted, will further reduce the error rate. A receiving station may communicate these optimal operational parameters to a transmitting station to modify operation of the transmitting station. Also disclosed is a method and apparatus for self-testing a communication system and channel to determine optimal slice points and operational parameters.

Abstract: A high-isolation, low-power high-speed multiplexer circuit suitably includes a buffer stage and a current steering tree stage. By employing common select lines for both stages of the circuit, both the input buffer and the deselected channel provide cumulative isolation for the deselected channels.

Abstract: A switch suitable for use in high-bandwidth environments is disclosed. The switch eliminates the need for inter-stage jitter compensation by determining the timing signals associated with each data input and then re-timing the data based upon the timing signals at the switch output. Bandwidth is conserved by routing timing signals through a multiplexer that preferably determines the difference between the timing signal and a reference signal, combines the difference signal with other difference signals calculated for other data inputs, and then transmits the multiplexed difference signals to a demultiplexer. Suitable multiplexing schemes include time division multiplexing, wavelength division multiplexing, code division multiple access (CDMA) multiplexing, as well as various combinations of suitable multiplexing methods.

Abstract: A compound collector double heterojunction bipolar transistor (CCHBT) incorporates a collector comprising two layers: a wide bandgap collector region (e.g., GaAs), and a narrow bandgap collector region (e.g., InGaP). The higher electric field is supported in the wide bandgap region, thereby increasing breakdown voltage and reducing offset voltage. At the same time, the use of wide bandgap material in the depleted portion of the collector, and a higher mobility material toward the end and outside of the depletion region, reduces series resistance as well as knee voltage.