Single driver circuit for driving a visible light source and an infrared light source

A control circuit comprising:

• a bridge circuit comprising:
• a voltage divider;
• a first resistance coupled to a first node;
• and
• a second resistance coupled to a second node;
• a driver comprising:
• a feedback input coupled to the voltage divider, and
• a current output coupled to the bridge circuit;
• a first light source coupled to the bridge circuit, wherein the first node is coupled to an output of the first light source and the voltage divider;
• and
• a second light source coupled to the bridge circuit, wherein the second node is coupled to an output of the second light source and the voltage divider.

An electronic device comprising:

• driver circuitry comprising:
• a feedback input terminal, and
• an output terminal;
• and
• bridge circuit comprising:
• a voltage divider,
• a first branch coupled to the feedback input terminal and the output terminal, the first branch comprising a first node, a first resistor and a first light source, wherein the first resistor is coupled to the first node, wherein an output of the first light source and the voltage divider are coupled to the first node, wherein the first resistor has a first resistance that limits a current through the first light source to within a first maximum current associated with the first light source, and
• a second branch coupled to the feedback input terminal and the output terminal, the second branch of circuit components comprising a second node, a second resistor and a second light source, wherein the second resistor is coupled to the second node, wherein an output of the second light source and the voltage divider are coupled to the second node, wherein the second resistor has a second resistance that limits a current through the second light source to within a second maximum current associated with the second light source.