Abstract
A design of gate-leakage-based timer using an amplifier-less replica-bias switching technique that can realize stable and low-voltage operation is presented. To generate stable oscillation frequency, the topology that discharges the pre-charged capacitor via a gate leaking MOS capacitor with low-leakage switch and logic circuits is employed. The test chip fabricated in 55-nm deeply depleted channel (DDC) CMOS technology achieves an Allan deviation floor of 200 ppm at a supply voltage of 350 mV in a 0.0022 mm2 area.
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