Innovative closed loop architecture enables adaptive biasing

27 March 2002 Telecoms, Datacoms, Wireless, IoT

Xicor has unveiled ODIN, a new architecture for high-performance adaptive closed loop control. According to the company, this innovative architecture allows systems designers to easily implement 'autocorrection' for errors related to time, temperature, or other system level effects.

The ODIN architecture features a high-precision input stage (comprised of an instrumentation amplifier and a low pass filter) capable of detecting signals as low as 50 mV in a 30 V common mode signal with 1% accuracy over temperature. This input signal is then amplified and compared to a programmable voltage reference. The value of the input (sensed) voltage, relative to the programmable reference, causes an increment or decrement to the programmable bias voltage source. Small changes in the input error signal cause an increment or decrement to the output drive, thereby closing the loop. The architecture also supports an on-chip register stack that can be used to store preset bias points, predetermined correction factors, or general-purpose system data.

The first product utilising ODIN, the X9470, is targeted at cell-basestation RF power amplifier biasing. It supports full static and dynamic autobiasing of LDMOS transistors. Additional features include temperature compensation and alarm functions, significantly reducing component count and cost.

Memec SA

021 674 4103

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