Title:
CIRCUIT AND METHOD FOR GENERATING TEMPERATURE-STABLE CLOCKS USING ORDINARY OSCILLATORS
Document Type and Number:
WIPO Patent Application WO/2021/138730
Kind Code:
A8
Abstract:
A circuit for generating temperature-stable clocks including first and second crystal oscillators, an input for a reference clock source, a clock output, a first phase acquisition circuit coupled to the first and second crystal oscillators, a second phase acquisition circuit coupled to the input for the reference clock source and to the second crystal oscillator, a first DPLL coupled to the first phase acquisition circuit, a crystal oscillator variation estimator coupled to the first DPLL, a second DPLL coupled to the second phase acquisition circuit and including a phase-frequency detector having a input coupled to the second phase acquisition circuit, a loop filter, a frequency subtractor having an input coupled to the loop filter and an input coupled to the crystal oscillator variation estimator, and a DCO coupled to the frequency subtractor and driving an input of the phase-frequency detector.
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Inventors:
MITRIC KRSTE (CA)
RAHBAR KAMRAN (CA)
RAHBAR KAMRAN (CA)
Application Number:
PCT/CA2020/000105
Publication Date:
September 15, 2022
Filing Date:
August 20, 2020
Export Citation:
Assignee:
MICROSEMI SEMICONDUCTOR ULC (CA)
International Classes:
H03K3/011; H03K5/131; H03L7/099
Attorney, Agent or Firm:
KUSHWAHA, Hetal et al. (CA)
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