Low noise trans-impedance amplifier

A method (400) of amplifying a voltage signal comprising:

• receiving differential input voltages with a first and a second differential voltage input nodes of a trans-impedance amplifier (TIA), the TIA including
• an input stage comprising a first and a second input PMOS transistors;
• a first and a second load NMOS transistors, wherein drains of the first and the second input PMOS transistors and drains of the first and the second load NMOS transistors are electrically connected;
• and a first and a second differential voltage input nodes respectively electrically connected to gates of the first and the second input PMOS transistors;
• and
• an output driving stage comprising a first and a second output circuits each comprising a first pair of PMOS and NMOS transistors electrically connected in parallel;
• a second pair of PMOS and NMOS transistors electrically connected in series;
• a pair of capacitors electrically connected in series;
• a differential output node electrically connected to a drain of a NMOS transistor of the second pair of PMOS and NMOS transistors;
• and a third PMOS transistor (MP7) electrically connecting a gate of the NMOS transistor of the second pair of PMOS and NMOS transistors to a drain of the first or the second input PMOS transistors (PM1, PM2) of the input stage;
• and a fourth pair of NMOS transistors (MN7, MN8) cross-coupled between the input stage and the output driving stage;
• amplifying the differential input voltages by the input stage and the output driving stage to create amplified differential output voltages;
• and
• outputting the amplified differential output voltages to the first and the second differential output nodes.