Heart rate data collection

A device, comprising:

• a controller, receiving a request to initiate a capture process, receipt of said request causing a gain to be set in at least a first amplifier and to operate a light emitter to emit a light signal toward a target surface;
• at least a first sampling circuit operated to sample a detected incident light signal based on operation of said light emitter and to produce an analog representation of said detected light signal;
• and
• an analog to digital converter operated to convert said analog representation of said detected incident light signal into a digital representation for further processing by said controller to complete a capture process and to disable said light emitter and said at least first sampling circuit.

A device, comprising:

• an input device, receiving a signal indicating a request to perform a sampling process;
• a controller, coupled to receive said signal from said input device, and operable to set a gain of at least a first amplifier in at least a first sampling circuit;
• cause a light emitter to emit a light signal;
• operate said at least first sampling circuit to sample a detected incident light signal to produce an analog representation of said detected incident light signal;
• operate an analog to digital converter to convert said analog representation of said detected incident light signal into a digital representation for further processing by said controller;
• and
• disabling said light emitter and said at least first sampling circuit in response to said operating said analog to digital converter.