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An On-Chip Relaxation Oscillator with Comparator Delay Compensation

DOI: 10.1109/TVLSI.2018.2882376

[/vc_column_text][vc_column_text] 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 (FOM2) is 173.3 dB.

Software Implementation:

• Tanner EDA

Advantages:

• Comparator delay is compensate by digital compensation loops
• Reduction in area and power

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