RC Frequency References Based on Dual RC FLLs
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Author / Producer
Date
2023
Publication Type
Book Chapter
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yes
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Abstract
This chapter introduces a dual RC frequency reference. It consists of a digital frequency-locked loop (FLL) in which the frequency of a digitally controlled oscillator is locked to a temperature-independent phase shift derived from two RC networks. It covers the operation principle of the dual RC architecture, key design techniques, and an implemented prototype. The measurement results show the dual RC frequency references achieve an inaccuracy of ±200 ppm over a temperature range from -40 °C to 85 °C after two-point trimming. It has great potential to be used in battery-powered wireless sensor nodes.
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Publication status
published
Book title
Biomedical Electronics, Noise Shaping ADCs, and Frequency References. Advances in Analog Circuit Design 2022
Journal / series
Volume
Pages / Article No.
245 - 257
Publisher
Springer
Event
Edition / version
1st Edition
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Software
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Subject
Frequency reference; RC; Frequency-Locked Loop (FLL); Dual-RC; Frequency-to-Voltage Converter (FVC); Oscillator; Temperature compensation; Voltage-Controlled Oscillator (VCO); Frequency divider; Clock generation; Wien-Bridge (WB) filter; Poly-Phase Filter (PPF); Phase information; Phase detector; Zero-Crossing (ZC); Phase/Frequency Detector (PFD); Phase-Domain; Temperature Coefficient (TC); Temperature Sensor (TS); Digitally Controlled Oscillator (DCO); Current Controlled Oscillator (CCO); Jitter