Topic
Relaxation oscillator
About: Relaxation oscillator is a research topic. Over the lifetime, 1952 publications have been published within this topic receiving 22326 citations.
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TL;DR: This paper adopts an alternative approach to minimize the RxO power: the use of a ratioed switched-capacitor reference and sub-clock power-gating of the high-power comparator, and the stability of the proposed design is further enhanced through the integration of digital-assist.
Abstract: Realizing the vision of a trillion IoT sensor nodes demands ultra low-power (ULP) compute, typically implemented using synchronous digital systems. These require low-power clock sources which must be fully integrated to meet low system-cost requirements. Hence, relaxation oscillators (RxOs) are popular. Their need for precision references and high-speed comparators can challenge power budgets; hence, prior works have explored low-speed closed-loop control for RxOs to alleviate this issue. This paper adopts an alternative approach to minimize the RxO power: the use of a ratioed switched-capacitor reference and sub-clock power-gating of the high-power comparator. The stability of the proposed design is further enhanced through the integration of digital-assist. This mixed-signal approach allowed a 1.2-MHz RxO to be implemented in 0.005 mm2 in TSMC 65 nm, with silicon measurements showing 0.7%/V line and 100 ppm/°C temperature stability. The energy-per-cycle figure of merit is 0.68 nW/kHz—a 4 $\times $ improvement over state-of-the-art for comparable stability.
16 citations
TL;DR: In this paper, a sinusoidally driven relaxation oscillator is studied by investigating the underlying one dimensional phase dynamics, and the map turns out to be a combination of conventional and "inverse" circle maps showing different types of supercritical behaviour.
16 citations
TL;DR: In this article, nonlinear distortion characteristics of GaAs/GaAlAs injection lasers under analog current modulation were experimentally investigated and it was shown that both fundamental and harmonic responses of a self-pulsing laser is indistinguishable from that of a laser with no R.O. resonance.
16 citations
Patent•
29 Apr 1965
16 citations