FREE subscription
Subscribe for free to receive each issue of Semiconductor Today magazine and weekly news brief.




























10 November 2006


TriQuint launches high-efficiency GaAs PA for enhanced-data-rate, longer-range Bluetooth with longer battery life

At the Electronica 2006 exhibition in Munich, Germany next week (14-17 November), TriQuint Semiconductor of Hillsboro, OR, USA will introduce its first GaAs power amplifier for the silicon-dominated 2.4-2.5GHz Bluetooth
market, designed for enhanced data rate (EDR) v2.0 Class 1 operation (allowing system data rates of 2 and 3Mbps) over long range.

The TQP770001 enables the high linearity required for these modulation modes and date rates, while offering high power added efficiency of 50% (at 21.5dBm output) and low power consumption, giving longer mobile device
battery life compared to silicon, claims TriQuint.

According to Strategy Analytics, the Bluetooth device market is growing at a compound annual rate of 24% to 420 million shipped in 2006, mainly for low-data-rate, short-range applications. But Class 1 Bluetooth systems allow
up to 100 meter ranges and provide for high data rates, "ideal for handsets and use in non-handset devices, which make up approximately 45% of the projected market," says product marketing manager Berry Leonard. Longer-range Class 1 designs are increasingly being targeted by
manufacturers of Bluetooth-enabled products, he adds.

TriQuint's InGaP HBT process technology also allows higher integration and hence smaller device size (in a 2x2mm QFN package) compared to silicon, the company claims, simplifying circuit board design and lowering the external
parts count.

The TQP770001 is a two-stage design with an integrated bias controller, which allows accurate device gain temperature compensation, power control (variable gain), as well as low current standby power control. All
functionality is internal to the package. Under EDR operation, its low AM-AM and AM-PM distortion guarantee high modulation accuracy. The TQP770001 can operate under a variety of Bluetooth modulation types, including FSK, 8DPSK, and Pi/4-DQPSK formats. Upgrading to Class 1 from existing Class 2/3 Bluetooth designs can be as simple as adding the TQP770001, a single-pole double-throw switch and a bandpass filter.