Analog differential small signal program-controlled amplification circuit

• Main Authors: DENG SHAOLIN, LI MEIGUANG, XUE AILUN
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2019
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; CONTROL OF AMPLIFICATION; ELECTRICITY

The utility model discloses an analog differential small signal program-controlled amplification circuit, belongs to the analog small signal acquisition technology, and is a novel circuit for program-controlled amplification of analog differential small signals. In a scene in which the amplification factor of the amplification circuit needs to be changed, the circuit is applied to realize a novelamplification factor program control circuit without using a screwdriver or other equipment, so that the problems of time and labor waste, inconvenience, inflexibility and component waste when the amplification factor of the amplification circuit in an industrial control field is changed are solved. The novel circuit comprises two stages of amplifying circuits, the first-stage amplifying circuit outputs a differential analog small signal into a single-ended signal with a fixed amplification factor, and the second-stage amplifying circuit performs adjustable amplification factor amplification on the single-ended signal