Apparatus for integrated offset voltage for photodiode current amplifier

An integrated circuit comprising:

• a first voltage source;
• a first amplifier having a noninverting input, an inverting input, and an output, the noninverting input is adapted to be coupled to a signal from an anode of a photodiode and is coupled to the first voltage source, and the inverting input is adapted to be coupled to a cathode of the photodiode;
• a first resistor having one terminal coupled to the inverting input of the first amplifier and another terminal coupled to the output of the first amplifier;
• a first capacitor having one terminal coupled to the inverting input of the first amplifier and another terminal coupled to the output of the first amplifier;
• a second voltage source different from the first voltage source;
• a second amplifier having a noninverting input, an inverting input and an output, the noninverting input is coupled to the output of the first amplifier, and the inverting input is coupled to the second voltage source;
• and
• a second resistor having one terminal coupled to the inverting input of the second amplifier and another terminal coupled to the output of the second amplifier.