Very High Voltage Super Power Amplifier

With the expansion of not less semiconductor process development and applicationof the range of not less, power amplifiers for industrial development and daily life isno longer strange. Developed to the Class D amplifier controlled by themicrocontroller PWM wave from the earliest simple Class A audio power amplifier,power amplifier development has reached a qualitative leap. The early stage of theamplifier in almost all germanium tube to do amplifier tube, due to defects ingermanium tube technology, performance indicators difficult to achieve high poweramplifier tube. Generally involving a total cut-off frequency of4kHz role, the highcurrent amplifier tube voltage value is only about30~40V. This restricts theamplifier high current, high voltage and the application of broadband domain. Assemiconductor technology matures, the increasing development of high voltage, highcurrent transistors, power amplifiers also began to progress to the high-frequencydomain, high-pressure high-current direction. The power amplifier also began todifferentiate into several broad categories, application and development in theirrespective fields.Power amplifier, different conductive manner in accordance with the amplifier tubecan be divided into Group A amplifier (Class A amplifier), CPI (B) of the amplifier(Class B amplifier), class AB amplifiers (class AB amplifier) and D class amplifier(Class D amplifier). The power amplifier described in this article belong to the classAB power amplifier. B power amplifier is characterized by high efficiency, but proneto crossover distortion. In this article, the more distortion in order to overcome thecross-B complementary symmetry circuit need to set the bias circuit to make it workin Class A and B states.Very high voltage large power amplifier, the name suggests, to achieve kV very highvoltage amplifier, to a certain level for the amplifier tube and circuit designrequirements, the amplifier output voltage of up to plus or minus500V; is called a super power amplifier this amplifier theoretical output power can reach tens ofthousands of kilowatts and even to infinity. This power amplifier is to add intelligentcontrol and testing part, so that the amplifier in the course of more secure andreliable. As the subject of the main design of the amplifier based on the demand, soin reality only do a few hundred kilowatts of output power, enough to meet customerneeds. The author of the research team, after a deep understanding of user needs,after the group serious discussion and careful design of this very high-voltage largepower amplifier. Overcome many difficulties in the implementation and debuggingprocess, the final completion of the project work.This article discusses the project needs of even high-voltage large power amplifier,the design process, project implementation and finished debugging, discussed thehistory of the development of the power amplifier, power amplifier structure, projectrequirements, design concepts, design methods, design perfection, the finishedproduct debugging work, the difficulties encountered and solutions. Which focuseson the hardware part of this amplifier, and the analysis and discussion to enablereaders to read this entire article would be very high-voltage power amplifiers have abetter understanding.The author during the entire project is completed, in the instructor’s help, the basicact as all the hardware design and implementation. All the hardware circuit diagramis basically advanced EDA software cadence to complete due to lack of experienceand other reasons, the design process is the side of the simulation analysis instructorsto complete the edge obey. For the implementation process, the printed circuit boarddesign and debugging, but also in the help and guidance of the instructor, but due tosome objective factors, this amplifier is still not put into the market and volumeproduction. If you found this article, defects and deficiencies welcome to givecriticism and guidance.Because of in the project focused on the hardware direction, so in this article focuseson the analog circuit section of the project, only Profile NC part.