Novel touchscreen controller enables touchscreens to function seamlessly with noisy battery chargers
February 14, 2011 // Paul Buckley
Cypress Semiconductor Corp., has unveiled a new feature for the company’s TrueTouch touchscreen controllers that enables touchscreens in handsets, cameras, GPS systems and other mobile systems to function seamlessly while connected to noisy chargers. Low-cost, third-party and after-market battery chargers emit large levels of common-mode noise that adversely affects touchscreen performance, often resulting in inaccurate touch readings or phantom touches.
Cypress’s new Charger Armor feature allows TrueTouch touchscreens to operate normally in the presence of AC noise.
The new feature, which is available in Cypress’s CY8CTMA3XX TrueTouch family, solves a common problem that mobile device manufacturers are struggling to overcome. Low cost chargers lack critical noise suppression components, and can generate tens of volts (peak to peak) across the frequency spectrum of 1 Hz to 1 MHz. The voltage spikes can go directly into the touch panel during the presence of touch, impacting touch performance. As such, many of the mobile phone vendors have worked together to create EN 62684 and EN301489, standards which regulate the noise spectrum for battery chargers. While Cypress’s TrueTouch technology alone can suppress noise at the levels of these standards, Charger Armor allows Cypress to go beyond the standards to deliver truly revolutionary charger noise immunity to the market, enabling mobile devices to operate with the lowest-cost chargers.
The Charger Armor feature is available today, and Cypress expects customers to introduce systems with Charger Armor in the first half of 2011.
For more information about the TrueTouch solution visit www.cypress.com/go/TrueTouch
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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
December 15, 2011 | Texas instruments | 222901974
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