A monolithic integrated UV receiver front-end amplifier circuit based on 4h-sic substrate

Abstract

The invention discloses a front end amplifying circuit based on a 4H-SiC substrate for a monolithically integrated ultraviolet light receiver. The front end amplifying circuit is characterized by comprising an ultraviolet detector, an RGC input circuit, a voltage gain circuit and an output circuit which are connected in series and are integrated on the 4H-SiC substrate, wherein the RGC input circuit is designed by a 4H-SiC MESFET device, and the feedback is formed by a common grid stage amplifying circuit and a common source stage amplifying circuit in a cascade manner; the front end amplifying circuit also comprises a negative feedback circuit of which both terminals are respectively connected with the input terminal of the voltage gain circuit and the output terminal of the output circuit. The front end amplifying circuit has the beneficial effects that the dominant pole of the circuit is effectively transferred by the RGC input circuit, the voltage gain circuit and the output circuit, and the bandwidth of the circuit is expanded; based on the 4H-SiC substrate, the front end amplifying circuit has the advantages of high temperature resistance, high power resistance and radiation resistance. Besides, the monolithically integrated ultraviolet light receiver can be operated in severe environments where other receivers are inadaptable; the circuit has wider bandwidth and low circuit noise, so that the monolithically integrated ultraviolet light receiver is suitable for ultraviolet light communication, and can be applied to the fields of satellite detection and the like.

Description

technical field [0001] The invention relates to a front-end amplifier circuit of an ultraviolet receiver, in particular to a single-chip integrated ultraviolet receiver front-end amplifier circuit based on a 4H-SiC substrate, which belongs to the field of electrical technology. Background technique [0002] With the continuous development of the information industry, the optical communication network is becoming more and more important. Relying on large transmission capacity and increasing speed, people are increasingly favoring light as a carrier for information dissemination. An optoelectronic integrated circuit that integrates photonic devices and electronic devices on one substrate was also born. Optoelectronic integrated circuits have the advantages of small size, light weight, low noise, high reliability, and low integrated inductance and capacitance, making them more and more popular in the fields of telecommunication systems, computer systems, military systems, and ...

AI Technical Summary

Problems solved by technology

However, these methods have some disadvantages. For example, the use of inductance peaking technology will make the chip area larger, and the introduction of inductance will increase the delay of the circuit signal. In addition, the inductance peaking technology is not suitable for integration

Common source level input can improve the noise performance and linearity of the circuit, but it has poor suppression effect on the influence of input capacitance

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