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Around The Circuit INDUSTRY NEWS Raytheon Co. has completed its merger with Hughes Aircraft 's defense operations. Raytheon reports the merger is part of the company's effort to remain a top-tier company in a consolidating defense industry. The defense operations will become part of Raytheon Systems Co. , a...

New Literature Accuracy Application Note This application note describes frequency accuracy for test equipment, including synthesized signal generators, network analyzers, frequency counters, spectrum analyzers and other equipment that use quartz crystal time base standards. Methods are presented to determine overall frequency uncertainty. Anritsu Co., Microwave Measurement Division, Morgan Hill,...

COMPONENTS GaAs IC Digital Attenuator The model AD 210-25 attenuator designed for wireless communications applications offers good power control reproducibility in 1 dB steps to 15 dB and repeatability of ±0.25 dB +5 percent of the attenuation setting. The unit offers low insertion loss of 1.3 dB (typ) at...

SOFTWARE Radiated and Conducted Immunity Testing Software The model SW1003 radiated and conducted immunity testing software meets IEC 1000-4-3 and 4-6 specifications and features automated calibration, testing and report generation. In addition, thresholding and closed-loop leveling for precompliance equipment investigation to IEC 801-3 or MIL STD 461 are offered....

MATERIALS Microwave-absorbing Urethane Foams The Eccosorb types QR-12 and QR-13 fire-retardant broadband microwave-absorbing urethane foams are certified to the UL-94 HF-2 standard. The urethane foams effectively kill cavity resonances over the 1 to 25 GHz frequency range. Applied to the cover of microwave power amplifiers, oscillators, low noise blocks...

SYSTEMS DC - 2 GHz DSP Radio Receiver The model Collins 95S-1A digital signal processing (DSP) radio receiver is designed for communications and surveillance applications, spanning the 5 kHz to 2000 MHz range in 1 Hz steps. The remotely tunable receiver uses state-of-the-art direct-conversion receiver DSP technology to attain...

AMPLIFIERS PCS Low Noise Amplifier The model JCA12-2300 PCS low noise amplifier is designed for use at room temperature and cryogenic applications. The unit realizes an improvement in noise figure of 0.1 dB for every 50° Kelvin decrease in temperature. The amplifier is unconditionally stable, includes SMA removable connectors...

DEVICE Low Voltage CMOS Logic Devices The MC74LVX series 3 V CMOS logic devices with 5 V tolerant inputs allow designers to mix 3 and 5 V devices in their designs without additional protection circuits. The units utilize a 0.8 mm CMOS technology process for fast, low noise and...

INTEGRATED CIRCUIT Dual-mode Silicon Chipset The Planet series chipset is a complete antenna-to-baseband dual-mode IS-95A solution. The chipset comprises the Venus RF receiver front end; Saturn dual-band IF amplifier; Jupiter in-phase and quadrature baseband filters; Pluto dual-mode baseband interface; and Moon dual-band modulator/RF amplifier. The chipset avoids GaAs using...

SOURCES 3000 - 6000 MHz VCOs The VCO690 and VCO691 series high frequency VCOs operate from 3000 to 6000 MHz with bandwidths from 10 to 600 MHz. The voltage tuning is 0.5 to 4.5 V DC in most models (0.5 to 12 V DC in wideband models). The voltage...