An optical clock receiver based on an injection locked ring oscillator featuring auto-calibration

An auto-calibration technique for injection locked ring oscillators (ILO) used as clock receivers is presented. ILOs have various clock distribution applications but need continuous active calibration, due to their sensitivity to PVT variations. The proposed circuit is capable of tracking environmen...

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Main Authors: Polster, R., Gonzalez Jimenez, J. L., Miro-Panades, I., Cassan, Eric
Format: Conference Proceeding
Language:English
Subjects:
Calibration
Clocks
Delays
Inverters
Optical pulses
Optical receivers
Ring oscillators
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Gonzalez Jimenez, J. L.
Miro-Panades, I.
Cassan, Eric
description An auto-calibration technique for injection locked ring oscillators (ILO) used as clock receivers is presented. ILOs have various clock distribution applications but need continuous active calibration, due to their sensitivity to PVT variations. The proposed circuit is capable of tracking environmental variations, due to aging or temperature variations, while keeping the lock to the injected signal. In particular this circuit has an acquisition range of 2.25 to 3.0 GHz, which allows locking the system to 2.5 GHz for temperature variations between 0C and 80C even for SS and FF corner variations, with injected currents of 5 μA of amplitude and duty cycle of 10%. The circuit was designed and tested in a fully-depleted SOI CMOS 28nm technology. It consumes 500 μA with active calibration and only 60 μA with deactived calibration.
doi_str_mv 10.1109/MWSCAS.2015.7282080
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subjects Calibration
Clocks
Delays
Inverters
Optical pulses
Optical receivers
Ring oscillators
title An optical clock receiver based on an injection locked ring oscillator featuring auto-calibration
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