A 150nW, 5ppm/o C, 100kHz On-Chip clock source for ultra low power SoCs
نویسندگان
چکیده
This paper presents an ultra low power clock source using a 1μW temperature compensated on-chip digitally controlled oscillator (OscCMP) and a 100nW uncompensated oscillator (OscUCMP) with respective temperature stabilities of 5ppm/C and 1.67%/C. A fast locking circuit re-locks OscUCMP to OscCMP often enough to achieve a high effective temperature stability. Measurements of a 130nm CMOS chip show that this combination gives a stability of 5ppm/C from 20C to 40C (14ppm/C from 20C to 70C) at 150nW if temperature changes by 1C or less every second. This result is 7X lower power than typical XTALs and 6X more stable than prior on-chip solutions
منابع مشابه
ppm/ ̋C on-Chip Clock Source Platform for Near-Human-Body Temperature Applications
We propose a fully on-chip clock-source system in which an ultra-low-power diode-based temperature-uncompensated oscillator (OSCdiode) serves as the main clock source and frequency locks to a higher-power temperature-compensated oscillator (OSCcmp) that is disabled after each locking event to save power. The locking allows the stability of the uncompensated oscillator to stay within the stabili...
متن کاملSpecial Session on Low-Power Systems on Chips (SOCs)
Low-power Issues for SoCs by Christian Piguet, CSEM . For innovative portable products, Systems on Chips (SoCs) containing several processors, memories and specialised modules are obviously required. Performances but also low-power are main issues in the design of such SoCs. Are these low-power SoCs only constructed with low-power processors, memories and logic blocks? If the latter are unavoid...
متن کاملAsynchronous on-chip networks
Various kinds of asynchronous interconnect and synchronisation mechanisms are being proposed for designing low power, low emission and high-speed SOCs. They facilitate modular design and possess greater resilience to fabrication time inter-chip and run-time intra-chip process variability. They can provide a solution for low power consumption in chips and simplify global timing assumptions, e.g....
متن کاملA Very Low Voltage 9th Order Linear Phase Baseband Switched Capacitor Filter (RESEARCH NOTE)
A very low voltage 9th order linear phase baseband switched capacitor (SC) filter has been designed to be used as part of a cellular GSM (Global System Mobile) receiver. A Gaussian-to-6dB filter of the order of seven is chosen and a second order function is added to reduce the group delay variations around. The filter uses a fully differential topology to increase the dynamic range and reduce t...
متن کاملSynthesis Based Design Techniques for Ultra Low Voltage Energy Efficient SoCs
Energy efficiency is increasingly becoming the main concern for many emerging system-on-chip (SoC) applications such as those for wireless sensor networks (WSNs) or portable electronics, which require ultra low power and high energy efficiency. Though voltage scaling down to near-(NVt) and subthreshold(sub-Vt) supply voltages has provided drastic quadratic savings in dynamic energy, design of c...
متن کامل