Trans-impedance amplifier based on diode feedback and photoelectric sensor

The invention provides a trans-impedance amplifier based on diode feedback. The trans-impedance amplifier comprises a photoelectric sensor and a signal amplification circuit used for amplifying the output current of the photoelectric sensor, the signal amplification circuit is a trans-impedance amplifier, and a negative feedback circuit of the trans-impedance amplifier is composed of a diode. The high resistance state of the reverse bias and forward cut-off state of the diode is used for replacing a required G omega order of magnitude large resistor, so that the problems of high cost and high production difficulty when the large resistor is used are solved, the cost is reduced, loop compensation is formed to a certain extent, and the stability of the circuit is improved. 本发明提拱了一种基于二极管反馈的跨阻放大器，该跨阻放大器包括光电传感器和用于放大光电传感器输出电流的信号放大电路，所述信号放大电路为跨阻放大器，所述跨阻放大器的负反馈电路由二极管构成，其利用二极管反向偏置和正向截止状态的高阻态来替代本身所需的GΩ数量级大电阻，避免了使用大电阻成本价格高、生产难度大的问题，降低了成本，且在一定程度上形成了环路补偿，提高了电路的稳定性。