Simulation tech supports nanometer silicon designs
Oct 1, 2004
With the introduction of new resistance and capacitance engines for its full-chip, transistor-level parasitic extraction solution, Calibre xRC, EDA vendor...
Quantifying system performance of GSM/GPRS PAs with differing levels of integration
Oct 1, 2004
By Mendy Ouzillou The two key power amplifier metrics are power and efficiency. When comparing
power amps with different levels of integration, the context of how the
specifications are defined is important. The performance of the system solution
is referenced to the antenna and battery, then distilled into one metric....
Bluetooth and WiFi integration: Solving co-existence challenges
Oct 1, 2004
By Jeffrey Wojtiuk As popular wireless technologies like Bluetooth and WiFi are being integrated on
common semiconductor substrates and printed circuit boards, this article looks
at a number of system challenges that must be overcome to ensure proper
interoperability with co-located Bluetooth and WiFi functionalities....
High-speed ADCs offer low power consumption
Oct 1, 2004
Combining 0.35-micron CMOS process with refinements in pipelined architecture, Linear Technology's newest high-speed analog-to-digital converters (ADCs)...
CMOS RF antenna switches offer new alternative
Oct 1, 2004
Implementing its proprietary ultrathin-silicon-on-sapphire (UTSi) CMOS, also known as UltraCMOS process, Peregrine Semiconductor has developed RF CMOS...
Using advanced signal analysis to identify sources of WLAN transmitter degradations
Oct 1, 2004
By Christian Olgaard Design engineers can use measurements of the error vector magnitude, frequency
error, phase noise, and the transmit power envelope to identify the sources of
degraded WLAN transmitter performance. In particular, techniques are described
to identify and troubleshoot the impacts of amplitude, phase, and group delay
imbalances between the I and Q channels, phase noise, spurious signals and
transient effects, and signal compression on transmitter performance....
LTCC module integrates power amplifiers
Sep 1, 2004
Exploiting low-temperature co-fired ceramic (LTCC) technology, EPCOS has set another milestone in miniaturization of passive electronic components for...
DSP brings base station SDR reality
Sep 1, 2004
By Andy McCann and Brad Brannon Developments in digital signal processing and data conversion are enabling the commercialization of software-based wideband receiver, thereby reducing the cost, size, complexity and power consumption of a base station. Moreover, with the emergence of powerful DSP processors, base stations can now support a multilingual variety of air/modulation schemes and protocols....
Effective Cascaded Intermodulation Analysis
Sep 1, 2004
By Rulon VanDyke A new simulation technique has been developed that empowers designers
to maximize intermodulation and noise performance while reducing analysis
time. Complicated, individualized, custom spreadsheets, math packages and ad
hoc tools are prone to error and unnecessary. This new simulation technique
leads to better designs, a quicker design phase and more revenue for the
company....
Active Components
Sep 1, 2004
Voltage variable attenuators Mini-Circuits' RVA-2500, 10 MHz to 2500 MHz broadband voltage variable attenuators provide up to 55 dB (typ) attenuation...
Is software-defined radio ready for mainstream?
Sep 1, 2004
Ashok Bindra, Editorial Director Many consumers have wondered if there was ever going to be a single radio unit that you could travel abroad with, without having to worry about changing hand phones. Well, help is on the way. Software-defined radio or SDR promises to deliver radio architecture that can alleviate the problem....
Products
Sep 1, 2004
Amplifiers Power amplifier module WJ Communications Inc. launched a 1.9 GHz PAS/PHS high-performance amplifier module offering excellent linearity and...
Understanding the sampling process
Sep 1, 2004
By R. N. Mutagi Sampling is the first step in the process of converting a continuous analog
signal to a sequence of digital numbers. This article provides an insight into
time and frequency domains of sampled signals. The concept of the spectral
window, defined by the sampling process, helps understand digital signals
and signal processing....
Products
Aug 1, 2004
TX RX 40 dB, DC-4 GHz high-power fixed attenuator Mini-Circuits' BW-40N100W a DC-4 GHz, 50 , 40 dB, 100 W fixed attenuator is intended for testing high-power...
Specifying a quartz crystal for a VCXO
Aug 1, 2004
By Ramon M. Cerda A popular application for the voltage-controlled crystal oscillator is the forming
of a phase-locked loop. Designing the VCXO for this application requires a
‘pullable’ quartz crystal....
Single test instrument targets wireless LAN
Aug 1, 2004
To support the high-volume manufacture of 802.11a/b/g wireless LAN (WLAN) products, San Jose, Calif.-based LitePoint Corp. has developed an advanced wireless...
Time and Frequency
Aug 1, 2004
Variable speed clock recovery Elcom's VSCR series enables clock recovery from NRZ and RZ data stream by automatically adjusting to any data rate within...
