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ST's latest IC line ready for 4G, battery demands

12 Nov 2012

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In an effort to help avoid dropped calls and increase battery life, semiconductor manufacturer STMicroelectronics has unveiled its latest range of highly miniaturized adaptive devices which greatly optimise handset antenna performance. ST's ParaScan Tunable Integrated Capacitor (STPTIC) is electrically adjustable to maintain efficient transfer of energy from the handset amplifier to the antenna under various operating conditions.

ST's latest offering has been designed to maximise radiated RF power for better call performance, overcoming the challenges of use in multiple frequency bands, when the handset is held close to the user's ear or when it is moved away from the head, while minimising amplifier power consumption for longer battery life.

The STPTIC allows capacitance to be adjusted smoothly, without steps, for greater precision. The STPTIC is also smaller, combining a single, variable capacitor with control circuitry using ST's Integrated Passive and Active Device (IPAD) technology.

Ricardo De-Sa-Earp, Group VP and General Manager for ST's IPAD Division, stated that the latest and most advanced STPTIC family delivers an even more compelling option for future 4G LTE handsets, which will demand high wireless performance for reliable voice and high-speed data communications with longer battery life. He also added that two of the world's top five handset manufacturers have already chosen this technology for antenna matching in their current handsets.

The company's latest line of devices uses the latest and most advanced generation of ParaScan Barium Strontium Titanate (BST) variable-capacitor technology. These devices meet the demands of wireless system designers by displaying high Q factor at frequencies up to 2.7GHz, more than 3:1 capacitance change with varying control voltage, and stable performance over the specified temperature range. Devices are easy to design-in, requiring only minimal external components, and have high power capability meeting the requirements of the GSM standard.

The STPTIC devices in the 6-pin microDFN and flip-chip packages are sampling now to lead customers direct from ST only, at prices starting at $0.50 and $0.48 respectively for volumes in the range of 1,000 pieces. Alternative pricing options for higher quantities are available on request.

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