At the IMS 2026, Microchip Technology highlighted its latest developments in precision timing through a live demonstration of its GNSS Disciplined Oscillators (GNSSDO). The presentation, led by David Bail, focused on how these systems maintain accurate timing performance even when satellite signals are disrupted.
David explained how GNSS disciplined oscillators rely on signals from global navigation satellite systems such as GPS to provide a primary timing reference. However, these signals can be lost due to interference, jamming, or environmental conditions. To address this, GNSSDO systems include internal oscillators that take over during such interruptions, ensuring continuity of precise timing.
Microchip demonstrated three different GNSSDO configurations, each using a different type of reference oscillator. These included quartz oscillators, chip-scale atomic clocks (CSACs), and rubidium frequency standards. Each technology offers distinct performance advantages depending on the timing requirements. Quartz oscillators are known for strong short-term performance, particularly their low phase noise close to the signal carrier. Atomic-based technologies, such as CSACs and rubidium standards, provide better long-term stability, which becomes important when GNSS signals are unavailable for longer periods. The choice of oscillator depends on how long the system must maintain accurate timing, also known as holdover duration.
Demonstration also focused on an “ultra-clean” GNSSDO design that combines both technologies. In this configuration, a low phase-noise quartz oscillator is paired with an atomic reference. This hybrid approach aims to deliver the benefits of both systems, strong short-term stability and improved long-term accuracy. The performance of these systems was illustrated using Allan deviation measurements, a standard method for analyzing frequency stability over time. The results showed that systems relying only on quartz oscillators experienced a gradual decline in stability over longer durations. In contrast, when an atomic reference was introduced, long-term stability improved significantly while maintaining strong short-term performance.
View the Video of David Bail Talking about Microchip's Product Range at IMS 2026
This combined approach also helps reduce phase error over extended periods and improves timing accuracy during GNSS outages. Such capabilities are important for applications that depend on uninterrupted synchronization, including telecommunications networks, navigation systems, and defense technologies.
The demonstration highlighted the importance of flexible timing architectures that can adapt to different operating conditions. By offering multiple oscillator options and hybrid configurations, Microchip aims to address a wide range of timing requirements across industries. Overall, their showcase emphasized how integrating different timing technologies can enhance system reliability, particularly in environments where satellite signals cannot always be guaranteed.
Click here to view Microchip's GNSSDO product line.
