Abstract:
This paper presents an ultra-low power temperature-compensated crystal oscillator (TCXO) with a pulsed injection XO driver for IoT applications. Temperature compensation ...Show MoreMetadata
Abstract:
This paper presents an ultra-low power temperature-compensated crystal oscillator (TCXO) with a pulsed injection XO driver for IoT applications. Temperature compensation is achieved using a single switched load capacitance, modulated by a ∆ΣM. The ∆ΣM digitizes a piece-wise linear (PWL) approximation of the XO temperature dependence where a coarse 4-bit temperature sensor selects the PWL segment. The proposed 32.768kHz TCXO achieves an accuracy of ±4.2ppm from -20℃ to 85℃ with 3-point trimming and Allan deviation floor of 34 ppb while consuming 43nW.
Published in: 2021 Symposium on VLSI Circuits
Date of Conference: 13-19 June 2021
Date Added to IEEE Xplore: 28 July 2021
ISBN Information: