Abstract: The present disclosure provides a trans-impedance amplifier, comprising: an inverting amplifier circuit, having an input end and an output end. The input end is coupled to an optical diode and is used for accessing an input voltage signal, and the output end is used for outputting an amplified voltage signal. The inverting amplifier circuit comprises at least three sequentially-connected amplifier units. Each of the amplifier units comprises two mutually-coupled N-type transistors, wherein one N-type transistor is used for receiving an input voltage, and the other N-type transistor is used for receiving a DC voltage signal. A common connection end of the two N-type transistors is used for outputting an amplified voltage signal, and the N-type transistor used for receiving the DC voltage signal adopts a native NFET. The trans-impedance amplifier further comprises a feedback resistor coupled to the input end and the output end of the inverting amplifier circuit.

Abstract: The present invention provides a self-adaptive current monitoring circuit, configured to monitor a current generated by an optical sensing element, including a voltage dividing unit coupled with the optical sensing element for generating a corresponding divided voltage signal according to a current signal of the optical sensing element; a comparison unit coupled with the voltage dividing unit for receiving and generating a monitoring signal according to the divided voltage signal; a threshold unit coupled with the comparison unit for receiving the monitoring signal and comparing the monitoring signal with a threshold signal to output a switch control signal; and a voltage regulation unit coupled with the threshold unit and the voltage dividing unit for receiving and generating a voltage regulation signal according to the switch control signal, and the voltage dividing unit receives and outputs an increased or decreased divided voltage signal according to the voltage regulation signal.

Abstract: The present disclosure provides a trans-impedance amplifier, comprising: an inverting amplifier circuit, having an input end and an output end. The input end is coupled to an optical diode and is used for accessing an input voltage signal, and the output end is used for outputting an amplified voltage signal. The inverting amplifier circuit comprises at least three sequentially-connected amplifier units. Each of the amplifier units comprises two mutually-coupled N-type transistors, wherein one N-type transistor is used for receiving an input voltage, and the other N-type transistor is used for receiving a DC voltage signal. A common connection end of the two N-type transistors is used for outputting an amplified voltage signal, and the N-type transistor used for receiving the DC voltage signal adopts a native NFET. The trans-impedance amplifier further comprises a feedback resistor coupled to the input end and the output end of the inverting amplifier circuit.

Abstract: The present invention provide a low dropout linear regulator with high power supply rejection ratio, including: a voltage dividing unit for generating a voltage dividing signal; a comparison unit including two input ends and an output end, one of the two input ends coupled with the voltage dividing unit for receiving the voltage dividing signal, the other input end for receiving a reference voltage signal, and the output end for outputting an amplified voltage signal according to the voltage dividing signal and the reference voltage signal; a voltage amplifying unit coupled with an output end of the comparison unit for providing a switch signal; and the switch unit coupled with the output end of the comparison unit, the voltage dividing unit and the voltage amplifying unit for responding to the switch signal and receiving and outputting a voltage reduction signal according to the amplified voltage signal.

Abstract: The present invention provides a self-adaptive current monitoring circuit, configured to monitor a current generated by an optical sensing element, including a voltage dividing unit coupled with the optical sensing element for generating a corresponding divided voltage signal according to a current signal of the optical sensing element; a comparison unit coupled with the voltage dividing unit for receiving and generating a monitoring signal according to the divided voltage signal; a threshold unit coupled with the comparison unit for receiving the monitoring signal and comparing the monitoring signal with a threshold signal to output a switch control signal; and a voltage regulation unit coupled with the threshold unit and the voltage dividing unit for receiving and generating a voltage regulation signal according to the switch control signal, and the voltage dividing unit receives and outputs an increased or decreased divided voltage signal according to the voltage regulation signal.

Abstract: The present disclosure provides a trans-impedance amplifier, comprising: an inverting amplifier circuit, having an input end and an output end. The input end is coupled to an optical diode and is used for accessing an input voltage signal, and the output end is used for outputting an amplified voltage signal. The inverting amplifier circuit comprises at least three sequentially-connected amplifier units. Each of the amplifier units comprises two mutually-coupled N-type transistors, wherein one N-type transistor is used for receiving an input voltage, and the other N-type transistor is used for receiving a DC voltage signal. A common connection end of the two N-type transistors is used for outputting an amplified voltage signal, and the N-type transistor used for receiving the DC voltage signal adopts a native NFET. The trans-impedance amplifier further comprises a feedback resistor coupled to the input end and the output end of the inverting amplifier circuit.

Abstract: The present invention provides a burst mode trans-impedance amplifier, comprising: a voltage input circuit, used for sensing an optical signal and converting the optical signal into an input voltage signal; a differential circuit, having two input ends and an output end, wherein one input end is coupled to the voltage input circuit and is used for receiving the input voltage signal, the other input end is coupled to a threshold voltage signal, and the output end is used for regulating and outputting a differential voltage signal according to the input voltage signal and the threshold voltage signal; and a feedback regulation circuit, having an input end and an output end, wherein the input end is coupled to the output end of the differential circuit and is used for receiving the differential voltage signal, and the output end is coupled to the voltage input circuit.

Abstract: The present disclosure provides a trans-impedance amplifier, comprising: an equivalent secondary amplifier module, having an input end and an output end, wherein the input end is coupled to an optical diode and used for accessing an input voltage signal, and the output end is used for outputting a secondarily amplified first voltage signal; an inverting amplifier unit, coupled to the output end of the equivalent secondary amplifier module and used for accessing the first voltage signal and outputting an inverting amplified voltage signal, the inverting amplifier unit comprising a third N-type transistor and a fourth N-type transistor coupled to the third N-type transistor; and a feedback resistor, coupled to the input end of the equivalent secondary amplifier module and an output end of the inverting amplifier unit. The feedback resistor of the trans-impedance amplifier can be not restricted by original conditions, may increase resistance, reduce input noise and improve sensitivity.