Bourns has created a surface-mount thin-film resistor series with AEC-Q200 compliance for automotive use. Model CRT-A resistors are available with tolerance of ±0.1, ±0.25, ±0.5 or ±1%, and temperature coefficients of ±50, ±25, ±15 or ±10ppm/°C. These compact, yet high power-rated resistors offering accurate resistance levels are increasingly required in space-constrained applications such as mobile phones, SD cards, DDR memory ...
City University of Hong Kong (CityUHK) has developed another approach to quell the self-destructive tendencies of perovskite solar cells in the face of moisture. It is a corrosion inhibitor that tackles ionic defects in the perovskite layer within the solar cell stack, even those created after manufacture. “Applying a living passivator on the perovskite surfaces enhances their resistance to environmental ...
Samsung is aiming at electric vehicle on-board chargers with a 1,000v 22nF multi-layer ceramic capacitor. CL32C223JIV1PN# (yes, there is a # in the part number) is aimed at CLLC resonant power supply topologies and is constructed with a COG dielectric. Operation is across -55 to +125°C and it has a ±5% tolerance. Packaging is a 2.5mm tall 3.2 x 2.5mm ...
Zhejiang University and Microaiot have created a passive crystal-less tag IC that both receives its instructions and is powered by Wi-Fi, and sends its responses over Bluetooth. They described the device at ISSCC in San Francisco this week. The tag has two antennas, with both used to extract power from the incident Wi-Fi field. One also receives the Wi-Fi (802.11b) ...
Bourns has announced a AEC-Q200 compliant, automotive grade semi-shielded power inductor series that operates across -40 to 150°C. SRN8040HA inductors are constructed using a “silicon-based coating that offers magnetic shielding”, according to the company. They “are designed to release lower magnetic field radiation compared to non-shielded inductors, and are a more cost-efficient alternative to fully shielded ferrite-based inductors”. The data ...
Stackpole has introduced surface-mount resistors with terminations on their long edges to improve thermal conductivity. “One of the most common and economical options for reducing the effects of high power is wide terminations,” according to the company. “By reversing the geometry of the chip resistor and applying the terminations to the long sides of the part, the hot spot temperature ...
NASA has revealed a technique which dramatically cuts the power consumption of Wi-Fi comms, at least at the remote terminal. Key is modifying the Wi-Fi base station to allow the transmitter of the remote terminal to be replaced by a modulated passive reflector. “In a Wi-Fi radio, 70-80% of power is consumed generating Wi-Fi signal. If you only reflect, you ...
Welwyn started making resistors in Bedlington Northumberland in 1946, and it is still making resistors there, in a growing facility, with technology that is in demand worldwide.
Like sun flowers following the sun, US researchers claim to have a passive solar tracking system for concentrator solar power generators. Concentrator systems use curved mirrors or lenses...
A resistor's voltage coefficient, is normally so minimal that it can safely be ignored, but in precision high voltage applications this error can become significant, writes Ian Moore
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