Trans-impedance amplifier based on parasitic parameter feedback of printed circuit board and infrared sensor

The invention discloses a trans-impedance amplifier based on parasitic parameter feedback of a printed circuit board and an infrared sensor, and the trans-impedance amplifier comprises an operational amplifier and a negative feedback circuit connected with the operational amplifier, wherein the negative feedback circuit is composed of a parasitic parameter module of the printed circuit board. According to the trans-impedance amplifier, the parasitic resistor of the printed circuit board is used for replacing a large resistor required by the trans-impedance amplifier, so that the problems of high production difficulty and high price when a resistor with the order of magnitude of G omega is used are solved, and the production cost is reduced; according to the signal amplification circuit of the infrared sensor, by adopting the transimpedance amplifier, the stability and the highest signal-to-noise ratio of the infrared photoelectric sensor can be achieved, and lower cost can be achieved; and parasitic parameter