Semiconductors / Integrated Circuits

RSS

Technical Feature Low Phase Noise SiGe Voltage-controlled Oscillators for Wireless Applications A low phase noise voltage-controlled oscillator (VCO) is one of the critical circuits in modern telecommunications systems. In recent years, silicon germanium (SiGe) BiCMOS technology has become one of the most promising technologies for VCO designs. This article...

Technical Feature A Varactor-tuned Oscillator with Linear Tuning Characteristic Munkyo Seo, Joo-Yeol Lee and Kyung-Kuk Lee LG Electronics Inc. Seoul, Korea Sangwook Nam Seoul National University Seoul, Korea In certain areas of microwave applications such as FMCW radars, FM modulators and phase-locked loop (PLL) circuits, the system performance is...

Technical Feature Designing a Bluetooth Transceiver in RF CMOS Bob Koupal and Marshall Wang Signia Technologies Milpitas, CA Cory Edelman Agilent Technologies Westlake Village, CA The design of a 2.4 GHz Bluetooth transceiver RFIC in CMOS requires careful verification of key performance criteria at all stages of the design...

Technical Feature A New Type of Amplitude Equalizer for In-band Flatness Improvement There is a growing need in modern communication systems for low cost bandpass filters of small size, high selectivity and flat passband response in order to meet the demands for inter-channel power balance, and to avoid interference....

Technical Feature Intermodulation Products for a Mixer Subjected to a Multi-carrier Signal Applying a multi-carrier signal to a mixer leads to a large range of intermodulation products. To perform a link budget of a multi-carrier transmit-receive system, it is important to predict the location and magnitude of those intermodulation...

Tutorial Externally Induced VCO Phase Noise This article describes the degradation of VCO phase noise due to noise on tuning and supply lines, particularly from tuning source resistance and supply voltage regulators. Dennis Colin Micronetics Wireless Hudson, NH VCOs, especially low noise wideband units, are extremely sensitive voltage-to-frequency converters,...

Application Note Technology and Innovation in Single Layer Capacitors Lambert Devoe and Alan Devoe Presidio Components Inc. San Diego, CA Single layer capacitors have been manufactured for many years for high frequency microwave applications. The simple parallel plate structure has advantages over multi-layer capacitors up to gigahertz frequencies due...

Product Feature A Mobile Ultra-low Phase Noise Sapphire Oscillator Poseidon Scientific Instruments Pty Ltd. Fremantle, Western Australia Radar, communications, and test and measurement designers require ever-improving phase noise performance in their master oscillator. For mobile system success, ultra-low phase noise performance must be coupled with exceptional immunity to vibration...

Cover Feature 2.5 V GaAs pHEMT Switches for GSM Handsets M/A-COM Lowell, MA A new line of robust GaAs pHEMT switches for operation in 2.5 V GSM handsets has been developed. These switches feature performance that is unrivaled in the industry for harmonics at 2.5 V in addition to...

Product Feature A CMOS-based Front-end Downconverter for GPS Applications Valence Semiconductor Irvine, CA The industry is striving for single-chip Global Positioning System (GPS) designs given the limited real estate available within cell phones, personal digital assistants (PDA) and other consumer electronic devices. Since GPS designs are typically comprised of...