Sensing arrangements for camera modules

A sensing arrangement for a camera module comprising:

• one or more temperature sensors, each temperature sensor having a respective temperature-sensitive resistor, a first temperature-sensing terminal, and a second temperature-sensing terminal;
• a driver chip communicably connected to each of the one or more temperature sensors, the driver chip having a first bias output connected to a first bias current source, a second bias output connected a second bias current source, and a set of inputs for receiving a voltage signal;
• and
• a multiplexer configured to selectively connect a selected temperature sensor of the one or more temperature sensors to the driver chip, wherein:
• in response to the driver chip applying a control signal to the multiplexer indicating the selected temperature sensor, the first bias output and a first input of the set of inputs are connected to the first temperature-sensing terminal of the selected temperature sensor, and the second bias output and a second input of the set of inputs are connected to the second temperature-sensing terminal of the selected temperature sensor, such that the voltage signal received by the set of inputs is indicative of a temperature measured by the selected temperature sensor.

A sensing arrangement for a camera module comprising:

• a position sensor having a first set of terminals and a first bias input;
• a temperature sensor having a second set of terminals, a second bias input, and a third bias input;
• a driver chip communicably connected to the position sensor and the temperature sensor, the driver chip having a first bias output connected to a first bias current source, a second bias output from a second bias current source, and a set of inputs for receiving a voltage signal;
• and
• a multiplexer configured to selectively connect the position sensor or the temperature sensor to the driver chip, wherein:
• in response to the driver chip applying a first control signal to the multiplexer indicating a selection of the position sensor, the first bias output or the second bias output is connected to the first bias input, and the set of inputs are connected to the first set of terminals, such that the voltage signal received by the set of inputs is indicative of a position measured by the position sensor;
• and
• in response to the driver chip applying a second control signal to the multiplexer indicating a selection of the temperature sensor, the first bias output is connected to the second bias input, the second bias output is connected to the third bias input, and the set of inputs are connected to the second set of terminals, such that the voltage signal received by the set of inputs is indicative of a temperature measured by the temperature sensor.