Transconductance shifted differential difference amplifier

An amplifier-based system circuit comprising:

• a first input stage circuit configured with a first transconductance value;
• a second input stage circuit configured with a second transconductance value that is less than the first transconductance value;
• a transimpedance circuit having outputs and being configured to receive one or more outputs from the first input stage circuit and the second input stage circuit;
• and
• a feedback loop circuit configured to provide input signals from the outputs of the transimpedance circuit to a first terminal of the second input stage circuit,
• the first input stage circuit being configured to not receive input signals from the feedback loop circuit.

A method comprising:

• receiving, at an amplifier, a first set of input signals at e first differential input pair terminals, in which the first set of input signals are not from a feedback loop circuit;
• receiving, at the amplifier, a second set of input signals at second differential input pair terminals, in which the second set of input signals are from the feedback loop circuit;
• performing, at the amplifier, a first input stage amplification for the first differential input pair terminals, in which the first input stage amplification is based on a first transconductance value;
• and
• performing, at the amplifier, a second input stage amplification for the first differential input pair terminals, in which the second input stage amplification is based on a second transconductance value that is less than the first transconductance value;
• and
• generating, at the amplifier, one or more output voltages based on the first input stage amplification and the second input stage amplification.