Abstract: Disclosed are techniques for sensing an ultrasonic signal. In aspects, a pixel circuit includes a first switch coupled to a first input signal configured to drive the first switch, a second switch coupled to a second input signal configured to drive the second switch, a capacitor coupled to the first switch and the second switch and configured to detect the ultrasonic signal, an output device coupled to the second switch and a power supply for the pixel circuit, wherein the output device is configured to store an input signal from the capacitor, wherein the input signal from the capacitor is received at the output device from the second switch, and an output switch coupled to the output device and a column of a pixel array, wherein the output device is configured to output the input signal to the column of the pixel array based on activation of the output switch.

Abstract: Certain aspects of the present disclosure generally relate to a boost converter. The boost converter generally includes an inductor coupled to a first node, a first switch coupled between the first node and a reference node for the boost converter, and a feedback control circuit. The feedback control circuit may include a first input coupled to the first node, a second input coupled to a terminal of the first switch, and an output coupled to a control input of the first switch. The feedback control circuit may include a first amplifier having a first input coupled to the first input of the feedback control circuit and a second input coupled to a first reference voltage source. The feedback control circuit may also include a second amplifier having a first input coupled to a second reference voltage source and an output coupled to a power supply node of the first amplifier.

Abstract: Certain aspects of the present disclosure generally relate to a boost converter. The boost converter generally includes an inductor coupled to a first node, a first switch coupled between the first node and a reference node for the boost converter, and a feedback control circuit. The feedback control circuit may include a first input coupled to the first node, a second input coupled to a terminal of the first switch, and an output coupled to a control input of the first switch. The feedback control circuit may include a first amplifier having a first input coupled to the first input of the feedback control circuit and a second input coupled to a first reference voltage source. The feedback control circuit may also include a second amplifier having a first input coupled to a second reference voltage source and an output coupled to a power supply node of the first amplifier.