Product category:
Analogue and Mixed Signal ICs
News Release from: Xicor | Subject: X9470
Edited by the Electronicstalk Editorial
Team on 15 February 2002
Architecture provides adaptive bias and
control
Xicor has unveiled ODIN, a new architecture for high-performance adaptive closed loop control.
Xicor has unveiled ODIN, a new architecture for high-performance adaptive closed loop control This innovative architecture allows systems designers to easily implement autocorrection for errors related to time, temperature or other system level effects
This article was originally published on Electronicstalk on 10 Mar 2003 at 8.00am (UK)
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The ODIN architecture features a high-precision input stage (comprising an instrumentation amplifier and a lowpass filter) that is capable of detecting signals as low as 50mV in a 30V 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.
Further reading
High-accuracy reference targets portable uses
The X60008A-50 is an extremely stable, highly accurate, low-power 5V voltage reference that is ideal for use in battery powered high-resolution data-acquisition systems.
Voltage references provide portable accuracy
Using its proprietary FGA floating gate analogue technology, Xicor has released 4.096V versions of its X60008 voltage reference products.
Small changes in the input error signal cause an increment or decrement to the output drive, thereby closing the loop.
The ODIN 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 using the ODIN architecture, the X9470, is targeted at cellular basestation RF power amplifier biasing.
This product, in early evaluation at key customers now, supports full static and dynamic autobiasing of LDMOS transistors.
Additional features of the X9470 include temperature compensation and alarm functions.
These features significantly reduce component count and cost for cellular basestation designs and improve system reliability, providing advanced warning for power fail, over- or undervoltage, or gate shutdown events.
Gartner Group estimates 2.2 million basestation transceiver units will be shipped in 2002 and this is expected to grow to 3.9 million units in 2005, driven by the rollout of 2.5G and 3G infrastructures.
Each basestation transceiver will require from three to six LDMOS transistors.
Each LDMOS transistor will require bias control similar to that supported by the X9470.
The X9470 will work with 2G, 2.5G and 3G basestation transceivers as well as point to multipoint and wireless local loop systems.
The ODIN architecture is seen by Xicor as a real breakthrough in adaptive bias and control.
It is exactly the kind of system level biasing problem where Xicor's experience and innovative use of nonvolatile technology for analogue trimming excels.
(This was Electronicstalk's Top Story on 14 February 2002).
(This was Electronicstalk's Top Story on 14 February 2002).
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