A Non-phase Bipolar High Voltage Proportional Amplifying Circuit

Abstract

The invention discloses an in-phase bipolar high-voltage proportional amplification circuit, comprising a first low-voltage integrated operational amplifier, a second low-voltage integrated operational amplifier, an NPN high-voltage triode transistor, a PNP high-voltage triode transistor, an emitter current signal sampling resistor, a load, a first high-voltage power supply and a second high-voltage power supply, wherein the first low-voltage integrated operational amplifier forms a phase inverter; the second low-voltage integrated operational amplifier forms a signal follower; the NPN high-voltage triode transistor and the PNP high-voltage triode transistor form a push-pull output device; one end of the sampling resistor is connected with emitters of the two high-voltage triode transistors and the other end of the sampling resistor is connected with a common end; the negative end of the first high-voltage power supply is connected with the positive end of the second high-voltage power supply; and the connecting end of the first high-voltage power supply and the second high-voltage power supply serves as a high-voltage output terminal and is in load connection between the high-voltage output terminal and the common end. The in-phase bipolar high-voltage proportional amplification circuit has simple and clear principle, is easy to implement and reproduce, and solves the problem of design difficulty of the high-voltage proportional amplifier in actual application.

Description

technical field [0001] The invention relates to an amplifying circuit, in particular to an in-phase bipolar high-voltage proportional amplifying circuit, which belongs to the field of semiconductor devices. Background technique [0002] In some application fields such as nuclear magnetic resonance, electron beam deflection and other devices, high scanning voltage (above hundreds of volts) is required, and good linearity is required. At present, the maximum output peak voltage of high-voltage integrated operational amplifier can only be within 150V, and Manufacturing costs are high and dependence on imports. For example, it has been retrieved that the PA42 high-voltage integrated operational amplifier launched by the American APEX company has a maximum supply voltage of ±175V and a maximum output voltage peak value of 150V. This is the highest level of high-voltage integrated operational amplifier products today. [0003] Designing a high-voltage proportional amplifier circu...

AI Technical Summary

Problems solved by technology

If the low-voltage small-signal integrated operational amplifier with mature technology and low price on the market can be used to drive the high-voltage transistor, and the high-voltage transistor outputs a high-voltage signal, it will be an economical and practical circuit solution, because the high-voltage transistor technology is also Very mature and inexpensive

Images