Circuits and Systems Group


The Circuits and Systems Group at Tyndall National Institute, University College Cork, specializes in analog and mixed-signal circuits for applications in communications and signal processing. Building on a foundation in nonlinear circuit theory, the group has developed expertise in mixed-signal testing, oscillators, and delta-sigma modulators and frequency synthesizers.

The group works closely with industry. Efficient algorithms developed by the group are being used by Analog Devices for production testing of ADCs and DACs. Other oscillator and ADC design projects have been completed in partnership with Freescale Semiconductor.

Students in the group are expected to participate in international conferences and to spend some of their time either in industry or with a partner university overseas. Currently, there are two final year, a Master and two PhD students and one Postdoctoral researcher all working under the supervision of Prof. Kennedy. The topics of undergoing projects include: Time-to-Digital Converters (TDCs), All Digital PLLs (ADPLL), Digital Delta Sigma Modulators (DDSMs) and Fractional-N Frequency Synthesizers.

Areas of Research include:

Modelling and Simulation of Fractional - N Frequency Synthesizers


Maximized Sequence Length Digital Delta-Sigma Modulators


Reduced Complexity Digital Delta-Sigma Modulators


Analytical Method to Predict Locking Range in Injection-Locked Frequency Divider 


Time-to-Digital Converters and All Digital PLLs (ADPLL)







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