SCSI boards ride both PCs and G3 Macs Product News 4/13/1999 Post a comment Advanced System Products Inc.'s line of SCSI boards for the PCI bus accommodates both PCs and G3 Macintosh computers. Based on the company's highly integrated, application-specific RISC microprocessor, those boards cover the SCSI landscape of 10-Mbyte/second Fast SCSI, 20-Mbyte/s Ultra SCSI and 40-Mbyte/s Ultra Wide SCSI. They support legacy SCSI devices and system boot from a SCSI drive.
Target: frequency spectra Product News 4/13/1999 Post a comment DSP Development has released DADiSP/Octave, an add-on module to the engineering spreadsheet software package called DADiSP. DADiSP/Octave is a menu-driven module designed for Octave and 1/3 Octave analysis. It measures and analyzes the frequency spectra of sonar, audio, vibration, seismic and other signals.
Cell USA designs PC-based DSO for bench-scope apps Product News 4/13/1999 Post a comment Cell USA Inc., a subsidiary of Cell SA in Paris, believes it has come up with a better digital oscilloscope-a virtual one-for bench-scope applications. The VDS (for virtual digital scope) and VMS (virtual mixed scope) are PC-based units but, unlike others, they need no IEEE-488 interface card or specially designed software for operation or remote control.
Board tester can perform power-off troubleshooting Product News 4/13/1999 Post a comment International Test Systems (ITS) has rolled out a new member of its CircuiTest line: the CircuiTest 1000S Troubleshooting and Test System, which tests for faults in printed-circuit boards. According to ITS, the 1000S enables power-off troubleshooting and contains many features found in advanced automated test equipment for a fraction of the cost.
PWM controllers pack a lot into 8 pins Product News 4/13/1999 Post a comment Pulse-width modulation (PWM) controllers for dc/dc converter designs from Cherry Semicon- ductor Corp. integrate many features into a single eight-pin device that is said to consume up to 40 percent less board space and eliminate up to 14 of the external components used in designs for industry-standard 384X PWM controllers.
Chip inductors target UHF apps Product News 4/13/1999 Post a comment Associated Components says its SMC0805 multilayer chip inductors feature zero percent coupling and high heat resistance for UHF applications. The parts are based on an EIA-standard 0805 footprint.
IDC sockets cut termination cost Product News 4/13/1999 Post a comment The 0.05- x 0.1-inch IDC sockets in Oupiin America Inc.'s Series 1203 are said to reduce costs for 0.025-inch ribbon-cable interconnects without sacrificing reliability. Targeted applications include memory systems, large disk drives and daisy-chain setups for which a midspan interconnection is needed.
Panel-mount stereo jacks roll Product News 4/13/1999 Post a comment Kycon has expanded its line of stereo jacks to include the STP-3501 series, designed for panel mounting in computer and multimedia audio applications.
SMT inductors are 2 mm high Product News 4/13/1999 Post a comment The surface-mount, shielded inductors in J.W. Miller's PM42S series come in a low-profile package measuring 2 mm high and 4.7 mm square. Target applications include PCMCIA cards and ultrathin dc/dc-converter modules.
Opto vendors eye Gbit data-rate apps Product News 4/13/1999 Post a comment Now that fiber is making notable headway in long-haul links and metropolitan loops, as well as some inroads into the campus backbone, significant opportunities are emerging for suppliers of optoelectronic transceivers and connectors. But as data rates rise, issues of device size, noise and electromagnetic interference are becoming increasingly pivotal in the trade-off between traditional copper and the newer fiber technologies.
HDTV filter from Micro Linear replaces dozens of discretes Product News 4/13/1999 Post a comment Micro Linear Corp. has introduced what it claims are the first HDTV video filters-output reconstruction filters with the potential to replace dozens of discrete components otherwise required to "clean up" video data after it has been converted to analog for playback on a TV
HP's software link helps test complex pc boards Product News 4/13/1999 Post a comment Hewlett-Packard Co. has come up with a way to test complex printed-circuit boards-those with higher node counts than in-circuit test solutions can handle alone. The HP E6220A test-aware software linkage allows the company's HP 5DX automated X-ray inspection system to share pc-board, CAD and test data with its HP 3070 Series 3 in-circuit test system.
Panasonic's 19-in. monitor undercuts some 18-in. tags Product News 4/6/1999 Post a comment At a time when many monitor makers are launching 18-inch LCD monitors in the $3,000 price range, the Display Monitors Division of Panasonic Computer Peripheral Co. is introducing a 19-inch LCD monitor with an estimated street price of just $2,000. Dubbed the PanaFlat LC90s, the 1,280 x 1,024-pixel SXGA-format monitor features built-in stereo speakers and a USB hub, providing one USB port for upstream connection to a host computer and four for hooking up other peripherals such as digital cameras,
Parvus' PC/104 boards deliver novel functions Product News 4/6/1999 Post a comment Some PC/104 products from Parvus Corp. provide functions yet to be seen on this bus. The PC/104 Postcard board (shown) is dedicated to displaying power-on-self-test (POST) codes during system bootup, for example, and the PC/104 Quad CPU Switch board lets four PC/104 CPU boards share one set of I/O devices.
PC/104 DSP board tuned for servo-motor control Product News 4/6/1999 Post a comment Measuring 3.55 x 3.775 inches, the Model 5950B PC/104 board from Technology 80 Inc. is a DSP-based servo motor controller delivering four axes of precision control. The rugged board contains high-speed clamping diodes for extended transient protection against external spiking and noise. Extensive use of current-limiting resistors hardens the hardware for industrial environments, the company said.
Clock-distribution ICs boast low skew Product News 4/6/1999 Post a comment Semtech Corp. has launched two high-precision clock- and data-distribution IC families that raise the bar on clock-skew performance. Semtech's SK15xx 1:5-output and SK19xx 1:9-output clock-distribution IC families provide channel-to-channel clock skew of less than 10 picoseconds (compared with 50 picoseconds for similar products); speeds of up to 2.6 GHz (vs. less than 1 GHz for equivalent products); and jitter of less than 1 picosecond.
Fairchild unveils 22-bit register Product News 4/6/1999 Post a comment Fairchild Semiconductor has introduced a 22-bit CMOS register, the 74VCX16722, for Jedec-compliant, 200-pin DIMM buffered memory modules with densities of 128 Mbytes, 256 Mbytes, 512 Mbytes and 1 Gbyte.
Philips microcontrollers based on 80C51 Product News 4/6/1999 Post a comment Philips Semiconductors has introduced the first device in a planned family of microcontrollers based on the 80C51 architecture. The 51LPC line will incorporate analog functions, brownout detection and an on-chip RF oscillator to reduce the need for external components.
Plug-in supplies target CompactPCI apps Product News 4/6/1999 Post a comment APW Electronic Solutions' 300-W modular plug-in power supplies are designed for ease-of-maintenance in CompactPCI applications. The supplies attach directly into the backplane. These hot-swap N+1 redundant supplies have a universal PFC input to lower harmonic distortion as well as overvoltage and overcurrent protection to ensure total safety.
High-voltage amp offers high slew rate Product News 4/6/1999 Post a comment The Model 20/20B high-voltage amplifier from Trek provides precise control of 0 to plus/minus 20 kV peak ac or dc voltages for applications in electrostatic deflection, dielectric materials studies and pulsed-field electrophoresis.
Inverter module backlights display systems uniformly Product News 4/6/1999 Post a comment TDK's CXA-1212-VJL, which employs current-feedback control to minimize the effect of voltage fluctuations on brightness, backlights 14-inch monochrome and LCD systems that employ cold-cathode fluorescent lamps (CCFLs). In place of parallel lamps in a single feedback circuit, the 25- x 180-mm module features dual outputs with individual current-feedback control for each dual-lamp design. Thus, fluctuations in input voltage, load and distributed capacitance have virtually no effect on brightness.
Vertical mount possible for SIP dc/dc converters Product News 4/6/1999 Post a comment The PT3320 series of 30-W isolated dc/dc converters from Power Trends features an open-frame 19-pin SIP housing and can be mounted vertically or horizontally. Vertically mounting these 48-V-input units saves more than 50 percent of the pc-board space occupied by an industry-standard quarter-brick.
Ring indicators take on current monitoring Product News 4/6/1999 Post a comment CR Magnetics Inc. has developed a way to monitor electrical current flow without test instruments. The CR45 series electrical current ring indicators slip over current-carrying wires or cables without splices or electrical connections. These self-contained, self-powered and non-intrusive devices weigh only 0.5 ounce, with dimensions of 1.29 x 0.95 x 0.46 inches. Installation of the indicators in an electrical panel gives maintenance people a quick visual readout at a glance.
One-piece Bivar light pipes block RFI, EMI noise leaks Product News 4/6/1999 Post a comment The Optoelectronics division of Bivar Inc. is offering a one-piece panel-mount light pipe. Devices in the PLP series transmit the output from a surface-mounted or through-hole LED to a front panel or display area, eliminating the need to affix the LED permanently to the front panel, according to Bivar.
PCs, comms spark resettable fuses Product News 4/6/1999 Post a comment The march of sophisticated circuits into personal computers and communications systems has triggered a surge in demand for polymer-based positive-temperature-coefficient (PTC) resettable fuses for overcurrent protection of USB ports, modems, disk drives, power supplies and other supplementary circuits downstream from the power line. Overcurrent conditions can be caused by a fault within a circuit, a battery malfunction or something as simple as adding or removing a computer peripheral.
High-input dc/dc devices target military, telecom Product News 4/6/1999 Post a comment Manufacturers responding to the call for high-input voltage dc/dc converters, which are increasingly required in a growing list of military, aerospace, industrial and telecom applications, have unveiled three such products within days of each other.
Small module packs Pentium PC Product News 4/6/1999 Post a comment Cell Computing Inc. will unveil its next generation of "component PCs" at the WinHEC 99 conference in Los Angeles this week. The Plug-N-Run family of 3- x 5- x 0.5-inch micro-motherboard modules is said to feature an advanced thermal design.
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...