CHiL Semiconductor Discusses Noise Reduction Utilities

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Digital filtering offers powerful utilities to restore communication in noisy designs

CHiL Semiconductor Corporation, a leading developer of high-performance, mixed-signal power management integrated circuits for the server, personal computer and high-volume computing market segments, discusses how its noise reduction utilities reduce environmental noise coupling that can corrupt digital transmission in power management buses in a recently posted podcast at http://www.chilsemi.com. The utilities reduce the hours of debug time that might otherwise be required, reducing the risk of board spins and ultimately speeding time to market.

Noise reduction is a new and highly relevant requirement in computing power systems. CHiL’s user programmable noise reduction utilities include a user configurable low pass filter on both clock and data inputs for high frequency noise rejection, glitch blanking utilities on both clock and data inputs to ignore false clock or data pulses, variable extra Tco (time from clock to output) delay to shift the VR controller setup and hold time window, and a variable timeout value to adjust the bus reset recovery time.

“The bottom line is that noise is always present. The challenge is to guarantee good noise immunity that keeps the noise from having an impact on data transmission,” says Frank Kern, CHiL’s staff engineer. “With CHiL’s programmable utilities, system integrators can adjust and optimize digital filtering after the board layout is completed without any need to modify the layout.”

The behavior and effectiveness of the noise reduction utilities was rigorously tested. Researchers verified noise coupling and corrupt communications when the digital utilities were turned off. They applied and tuned the digital filters to restore communication. The experiment was repeated under a variety of conditions and was repeatable across every transmission packet. The devices were found to be reliable across all test conditions even with noise present in system.

To learn more about how CHiL’s noise reduction utilities can reduce debug time and speed time to market, go to http://www.chilsemi.com.

About ChiL Semiconductor
CHiL Semiconductor Corporation develops high-performance, mixed-signal power management integrated circuits primarily targeted at servers, personal computers and other high-volume computing market segments. CHiL Semiconductor’s devices tightly integrate digital technology, precisely monitoring and controlling the power management process. Providing unique, intelligent features, CHiL devices yield significant system power efficiency and performance gains, while reducing system design and complexity.

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Kristin Nugent

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