LONDON – Mobile phone and tablet computers are now so densely packed with chips that they can interfere with each other, in particular with touch-screen sensing ICs giving rise to false moves and taps, according to analog and mixed-signal chip and foundry vendor MagnaChip Semiconductor Corp. (Seoul, South Korea). The company has responded to the problem by offering a high-voltage option for its 0.18-micron embedded EEPROM technology.
The process module has been developed to work at 20-volts with high-voltage capacitors and 20-V transistors to improve the signal-to-noise ration and noise immunity.
In particular the trend in smartphones, tablet computers towards thinner designs has resulted in a closer proximity of components and power management circuits and this has caused an increased susceptibility to both internal and external electronic noise, MagnaChip said.
The use of 20-V transistors and capacitors has been introduced without compromising memory and logic performance characteristics, MagnaChip added. MagnaChip said it is also preparing a 30-V EEPROM process suitable for mobile applications with larger screens. The 30-V EEPROM is due to be available in 2013.
Previously in this blog series we looked at using a DC/DC converter (switching regulator) in combination with an LDO to drive the power supply inputs to an ADC. What we found was that using the DC/DC converter to step down the input voltage for the LDO was a much more efficient way to drive the power supply inputs to an ADC.
I have always followed and enjoyed Bill Schweber’s witty and informative articles from the time he was at Analog Devices on through his time at EDN and EE Times and now as he writes for us on Planet Analog.