An On-Chip Relaxation Oscillator with Comparator Delay Compensation
Journal
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Journal Volume
27
Journal Issue
4
Pages
969-973
Date Issued
2019
Author(s)
Abstract
In this brief, a relaxation oscillator with comparator delay compensation is presented. Two digital compensation loops are introduced to compensate for the comparator delay. This relaxation oscillator is fabricated in the 0.18-μm CMOS process. The measured average oscillation frequency is 943.1 kHz. The whole oscillator consumes 5.2 μW under a 0.9-V supply. The measured average temperature coefficients (TCs) of the oscillation frequency with and without compensation are 93.88 and 618.17 ppm/°C, respectively. It achieves a TC improvement of 6.6×. The measured frequency variation is within ±0.7% from -10 °C to 100 °C by using the DCLs. The measured line sensitivity is 4.37%/V. The measured figure of merit (FOM 2 ) is 173.3 dB.
SDGs
Type
journal article