Balanced light detector

A light detector comprising:

• a first light detector having an first output, the first light detector configured to provide a first electrical signal from the first output, the first electrical signal representing light intensity of light received by the first light detector;
• a first amplifier coupled to the first output of the first light detector, the first amplifier operable to amplify the first electrical signal to yield a first amplified electrical signal;
• a second light detector having a second output, the second light detector configured to generate a second electrical signal from the second output, the second electrical signal representing light intensity of light received by the second light detector;
• a second amplifier coupled to the second output of the second light detector, the second amplifier operable to amplify the second electrical signal to yield a second amplified electrical signal;
• and
• a common offset circuit operably coupled to the first and second outputs of the first and second light detectors, the common offset circuit configured to apply a common offset to the first and second outputs, whereby noise introduced to the first and second outputs by the common offset is common to the first and second outputs.