A single optical sensor uses dual-gain transimpedance amplification to cover weak and strong flame signals without added sensor complexity or switch delay.
Third electrodes and differential receivers suppress display-panel parasitic and common-mode noise to improve touch sensing accuracy.
Separated third electrodes and differential receivers cancel display-panel ripple and parasitic noise, improving on-cell touch sensitivity.
One-time calibration stores a clamp control code so suspend mode can hold source voltage while the bandgap reference shuts down to cut power.
A positive-temperature-coefficient bias current offsets transistor drift to keep RF amplifier output power and linearity stable across temperatures.
A transistor-based RHP zero cancellation scheme stabilizes op-amps across process and temperature shifts without reducing bandwidth.
A dynamic start-up circuit maintains the resistive voltage divider ratio in low-dropout regulators using a feed-forward capacitor and switching mechanism.