Lens Drivers Focus on Performance in High-Resolution Camera Modules

An Evolution of Resolution is driving the development of cell phone camera modules. Autofocus is now standard in high-resolution cameras, and features such as optical zoom, shutter control, and image stabilization are becoming common. These require the lens to move rapidly. The lens driver powers a motor to move the lens in response to digital signals. This article discusses three types of motors and how to drive them.

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Capacitance Sensors for Human Interfaces to Electronic Equipment

Mechanical buttons, switches, and jog wheels have long been used as interfaces between users and machines, but their many drawbacks have led designers to look for more reliable solutions. Capacitive sensors, which can be used in place of buttons, can also add versatility. Available ICs can measure the capacitance of up to 14 sensors, compensate for environmental changes, and provide a digital output.

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