1. A circuit comprising: at least one photosensor, each photosensor comprising an input that is configured to receive an optical signal; a respective diode coupled to each photosensor, each respective diode comprising an input that is coupled to an output of the coupled photosensor; a multiplexer comprising an input that is coupled to the output of each of the at least one photosensor; and an amplifier comprising an input that is coupled to the output of the multiplexer.