A 4 GHz phase locked loop design in 65 nm CMOS for the Jiangmen Underground Neutrino Observatory detector
| Autor: | Volker Christ, Pavithra Muralidharan, Markus Robens, Dennis Nielinger, Daniel Liebau, U. Yegin, S. van Waasen, A. Kruth, Christian Grewing, A. Zambanini, Christian Roth, Nina Parkalian |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
business.industry 020208 electrical & electronic engineering Detector Electrical engineering 020206 networking & telecommunications Topology (electrical circuits) 02 engineering and technology Phase-locked loop Voltage-controlled oscillator CMOS Phase noise 0202 electrical engineering electronic engineering information engineering Charge pump business Instrumentation Mathematical Physics Voltage Elektrotechnik |
| Popis: | This paper presents a 4 GHz phase locked loop (PLL), which is implemented in a 65 nm standard CMOS process to provide low noise and high frequency sampling clocks for readout electronics to be used in the Jiangmen Underground Neutrino Observatory (JUNO) experiment. Based on the application requirements the target of the design is to find the best compromise between power consumption, area and phase noise for a highly reliable topology. The design implements a novel method for the charge pump that suppresses current mismatch when the PLL is locked. This reduces static phase offset at the inputs of the phase-frequency detector (PFD) that otherwise would introduce spurs at the PLL output. In addition, a technique of amplitude regulation for the voltage controlled oscillator (VCO) is presented to provide low noise and reliable operation. The combination of thin and thick oxide varactor transistors ensures optimum tuning range and linearity over process as well as temperature changes for the VCO without additional calibration steps. The current mismatch at the output of the charge pump for the control voltage at about half the 1 V supply voltage is below 0.3% and static phase offset down to 0.25% is reached. The total PLL consumes 18.5 mW power at 1.8 V supply for the VCO and 1 V supply for the other parts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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