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Abracon, LLC (Abracon), a leading global manufacturer of frequency control, timing, synchronization, RF, connectivity and power components, announces the availability of a new Automotive and Industrial Grade solutions guide.
Since the inception of the serial data transceiver, reference clock jitter has been a strong consideration when designing communications links. Is it a surprise that low clock jitter has remained significant? Why does clock jitter matter?
I fondly recall working on the first generation of 10Gigabit FPGA SERDES and struggling to accurately capture 10 picoseconds of timing jitter on high speed repetitive sampling oscilloscopes. At that time, advanced microwave transition analyzers could discern timing noise below the 1 picosecond level but that was rarely necessary. Since SERDES on those first FPGAs with high speed serial transceivers displayed a fair amount of inherent noise, clock jitter below 1psec rms was generally irrelevant.
Cutting edge, innovative, and exhilarating, the IoT has caught the attention of millions of businesses and consumers around the world. Its easy to mistake the technologies of the IoT and their profitability as an overnight success; however, it would not be possible without key innovations over decades of work. At the heart of IoT technology is electronic timing.
It was the summer of 2012 when a frantic scramble occurred deep within a lab in Silicon Valley. At a time when wearables and other IoT markets were just starting to ramp, a show stopping problem was discovered. With wearables shipments in the low millions for the first time, this problem had to be solved. Panicked, highly skilled engineers on multiple coasts and across continents attempted to solve the problem. The quartz crystal on the MCU would not reliably start.
The emergence of the IoT has accelerated the trend towards lower power consumption on many MCU and RF chipsets, pressuring IC designers to wring out every bit of energy savings in their circuits. The consequence, pertaining to the clocking scheme, is usually a weaker oscillator loop amplifier starved of transconductance (gm). The reduced power consumption has the potential to severely affect analog circuits, such as the Pierce oscillator.
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