Fully-integrated timers for ultra-low-power Internet-of-Things nodes—Fundamentals and design techniques
Driven by the momentum toward compact and low-power Internet-of-Things (IoT) systems,
the research on fully-integrated and energy-efficient kHz-to-MHz timers increased …
the research on fully-integrated and energy-efficient kHz-to-MHz timers increased …
A 0.9-V 28-MHz highly digital CMOS dual-RC frequency reference with±200 ppm inaccuracy from− 40° C to 85° C
W Choi, J Angevare, I Park… - IEEE Journal of Solid …, 2021 - ieeexplore.ieee.org
This article presents an energy-efficient dual-frequency reference intended for wireless
sensor nodes. It consists of a digital frequency-locked loop (FLL) in which the frequency of a …
sensor nodes. It consists of a digital frequency-locked loop (FLL) in which the frequency of a …
A 32-MHz, 34-μW Temperature-Compensated RC Oscillator Using Pulse Density Modulated Resistors
Highly stable on-chip frequency references offer the possibility of replacing crystal oscillators
in many cost-and form-factor-constrained applications. However, achieving good frequency …
in many cost-and form-factor-constrained applications. However, achieving good frequency …
A 16 MHz CMOS RC frequency reference with±90 ppm inaccuracy from− 45° C to 85° C
This article presents a 16-MHz RC frequency reference implemented in a standard 180-nm
CMOS process. It consists of a frequency-locked loop (FLL) in which the output frequency of …
CMOS process. It consists of a frequency-locked loop (FLL) in which the output frequency of …
31.3 A 0.14mm2 16MHz CMOS RC Frequency Reference with a 1-Point Trimmed Inaccuracy of ±400ppm from -45°C to 85°C
Recently, rapid strides have been made in improving the accuracy of RC-based frequency
references [1-3]. Inaccuracies better than±500ppm from-45° C to 85° C have been achieved …
references [1-3]. Inaccuracies better than±500ppm from-45° C to 85° C have been achieved …
A single-crystal-oscillator-based clock-management IC with 18× start-up time reduction and 0.68 ppm/ºC duty-cycled machine-learning-based RCO calibration
The conventional cellular mobile device needs a tens-of-MHz main crystal oscillator (XO)
and 32.768 kHz real-time clock (RTC) XO for RF ultra-low-jitter PLLs and sleep operation …
and 32.768 kHz real-time clock (RTC) XO for RF ultra-low-jitter PLLs and sleep operation …
A 2.5 ppm/° C 1.05-MHz relaxation oscillator with dynamic frequency-error compensation and fast start-up time
This paper presents a 1.05 MHz, on-chip RC relaxation oscillator (ROSC) with a temperature
coefficient (TC) of 2.5 ppm/° C and an absolute variation of 100 ppm over the body …
coefficient (TC) of 2.5 ppm/° C and an absolute variation of 100 ppm over the body …
3.5 A 34µW 32MHz RC Oscillator with±530ppm Inaccuracy from− 40° C to 85° C and 80ppm/V Supply Sensitivity Enabled by Pulse-Density Modulated Resistors
This paper presents a method for precise and robust cancellation of the resistor TC across
process using a parallel combination of two switched-resistors [5] that are digitally-controlled …
process using a parallel combination of two switched-resistors [5] that are digitally-controlled …
A second-order temperature compensated 1μW/MHz 100MHz RC oscillator with±140ppm inaccuracy from-40 C to 95 C
On-chip RC-based frequency references are increasingly being used to generate device
clocks. They consume lower power, occupy a small area, and do not require costly off-chip …
clocks. They consume lower power, occupy a small area, and do not require costly off-chip …
A 0.84 pJ/cycle wheatstone bridge based CMOS RC oscillator with reconfigurable frequencies
A low-power CMOS RC relaxation oscillator supporting reconfigurable frequencies is
presented for timekeeping in low-power Internet of Things (IoT) devices. The oscillator …
presented for timekeeping in low-power Internet of Things (IoT) devices. The oscillator …