Energy Storage Industry Needs Novel Circuits And Semiconductors

 By Bobby Maher, Full Power Inc.

Electric double-layer capacitors (EDLCs), better known as ultracapacitors or supercapacitors, are now a primary energy storage option for design engineers. During the past 10 years, we have seen the emergence of this technology, especially with the move toward "green" and more energy-efficient options. These devices have an advantage over batteries, particularly in applications requiring long life or operation in low temperatures.

Create A Mixed-Mode Precision Rectifier With Second-Generation Current Conveyors

 By Abhirup Lahiri, Netaji Subhas Institute of Technology

Rectifiers perform an important signal-processing function in many analog circuits. But conventional half-wave, full-wave, or bridge rectifiers employing diodes can't be used with low-amplitude signals. The circuit described below is a mixed-mode precision rectifier that can handle both low-amplitude voltage and current signals.

SIC MOSFET Modules Boost Efficiency

Promising higher efficiencies, the QJD1210006 and QJD1210007 silicon carbide (SiC) MOSFET modules from Powerex Inc. can operate at temperatures well beyond those possible with silicon IGBT-based modules with 38% lower conduction losses and 60% lower switching losses for a total power-loss reduction of 54% when operating at 20 kHz.

ESD Array Guards Data Lines In Portables

Residing in a 2- by 2-mm, five-pin SC70 package suitable for portable products, the MAX14541E diode array from Maxim Integrated Products protects three-channel data interfaces from electrostatic discharge (ESD) spikes up to ±15 kV (Human Body Model).

Encased VCO Sports 1-GHz To 2-GHz Bandwidth

Residing in an aluminum enclosure measuring 1.25 by 1.25 by 0.58 in. with SMA connectors, the CRBV55CW-1000-2000 RedBox voltage controlled oscillator (VCO) from Crystek Crystals Corp. operates from 1 to 2 GHz with a control voltage range of 1 to 20 V.

DC Fans Deliver Optimal Airflow

Promoting reliable and even airflow in telecomm, networking, and other large equipment enclosures, the VA series dc fans from Orion Fans boast significantly higher CFMs in a smaller frame package size than comparable cooling components, according to the company.