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Cited by 44 publications
(11 citation statements)
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“…A fully differential operation is employed to effectively mitigate any common-mode (CM) noise (e.g., supply noise) or coupled interference. It consists of two single-ended 8-bit R-2R-ladder DACs [53], two sharing capacitors (C share ), a 9-bit differential SAR-ADC 17 [52], a timing controller, a digital loop filter, a quadrature DCO (Q-DCO), and its harmonic extractors (HEs). Resistors in the R-2R DACs are properly sized, enabling the sharing capacitors to be charged to the expected voltage during the high level of ref.…”
Section: A Architecturementioning
confidence: 99%
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“…A fully differential operation is employed to effectively mitigate any common-mode (CM) noise (e.g., supply noise) or coupled interference. It consists of two single-ended 8-bit R-2R-ladder DACs [53], two sharing capacitors (C share ), a 9-bit differential SAR-ADC 17 [52], a timing controller, a digital loop filter, a quadrature DCO (Q-DCO), and its harmonic extractors (HEs). Resistors in the R-2R DACs are properly sized, enabling the sharing capacitors to be charged to the expected voltage during the high level of ref.…”
Section: A Architecturementioning
confidence: 99%
“…A careful design of an isolating buffer between the sampler and oscillator is also necessary to reduce the reference spurs [6]. On the other hand, the circuitry for IL itself is usually quite simple, whereas much more effort must be focused on its frequency-tracking loop (FTL) to maintain the oscillator's free-running frequency close to N× reference frequency against PVT variations [14]- [17]. There exists a significant danger of a timing-race problem between the injection of reference events and FTL since the phase error may be corrected by the IL before the FTL can sense its corresponding frequency error.…”
mentioning
confidence: 99%
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“…A S the CMOS technology advances, the flicker (1/f ) noise upconversion in oscillators has become a serious issue due to the increasingly worsening intrinsic 1/f noise in MOS transistors, especially in FinFETs [1] and FD-SOI [2]. At the same time, the emerging applications of 5G/6G wireless communications [3]- [13], high-speed wireline links [14], [15], and quantum computing [16]- [18] all rely on frequency sources of ultra-low phase noise (PN). Thus, a deep understanding of flicker noise upconversion and ensuing reduction mechanisms in oscillators is highly desired.…”
Section: Introductionmentioning
confidence: 99%