Single-stage amplifying circuit with automatically adjustable quiescent point

Abstract

The invention discloses a single-stage amplifying circuit with automatically adjustable quiescent point, which belongs to the application field of the electronic technology. The single-stage amplifying circuit comprises a singlechip, a digital potentiometer, the single-stage amplifying circuit, an A / D converting circuit, and a keyboard circuit and a display circuit which are connected with the singlechip. The single-stage amplifying circuit is characterized in that: resistors R1, R2, R4 and R5 are adjustable resistors in the digital potentiometer; the singlechip can control resistance values of resistors R1, R2, R4 and R5; the A / D converting circuit is used for monitoring the value of the static work point; and the keyboard circuit and the display circuit are used for setting and displaying the value of the static work point respectively. The single-stage amplifying circuit of the invention has the advantages that: the plurality of adjustable resistors inside the digital potentiometer replace an ordinary potentiometer adjusted manually, so that the resistance value of the digital potentiometer is controlled by the singlechip so as to adjust the static work point of the single-stage amplifying circuit in real time.

Description

technical field [0001] The invention is a single-stage amplifying circuit whose static working point can be automatically adjusted, belongs to the application field of electronic technology, and can be used in electronic technology experimental equipment, various instruments and meters and control units. Background technique [0002] At present, the electronic technology experimental training equipment of some university electrical students and the single-chip experimental training equipment are independent of each other, the experimental training resources are not organically combined, the utilization rate of experimental resources is low, it is a waste of resources, and the knowledge learned by students is not effective. , Consolidated and applied continuously and comprehensively, the single-stage amplifying circuit is one of the contents of the experimental training of the "Electronic Technology" course for college electrical students; in the control units of some instrume...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the mutual combination between the experimental training of the single-stage amplifier circuit and the actual programming training of the single-chip microcomputer in the course experiment of "Electronic Technology", solve the problem that the two kinds of experimental equipment are disconnected from each other, solve the continuity of knowledge learning, Consolidation, comprehensiveness, and integration issues; solve the problem of poor real-time adjustment ability of the static operating point of single-stage amplifier circuits in practical applications

Images