NUJIRA is the leading supplier of ultra-high efficiency RF power amplifier technology. Nujira's High Accuracy Tracking (HAT^TM) Modulators for 3G, LTE, DVB and WiMAX power amplifiers enable infrastructure OEMs to design more power-efficient, smaller, and cheaper base stations to meet the increasingly demanding needs of operators and broadcasters worldwide.

The Brief

Nujira needed an early stage partner to support them in prototype development of their pioneering High Accuracy Tracking (HAT^TM) Modulators. This required real-time control and monitoring of high power circuitry in reaction to a constantly varying input modulation envelope.

The Solution

Fen worked with Nujira's engineering team to develop a low cost, high quality prototype solution that Nujira could further develop to a volume production version. This involved interacting with system architects, FPGA, DSP, software and hardware experts to create a robust effective design.

The Skills and Experience Used

• System - Analysis of problem, specification development, and implementation and testing of solution
• Hardware - Embedded processor/FPGA control and monitor loop circuitry for low power, compact, low cost design, including power sequencing and high resolution DACs.
• Software - Worked with FreeRTOS on an ARM7 LPT21xx processor to write full C code device and function drivers, and complex multi-tasking state machine to enable controlled/monitored power-up/down sequences.
• Test & Production - Developed a host interface; a script-based host emulation tool used in design evolution, DVT and production test; and an ActiveX interface for interface to production test applications.

The Customer Reaction