Therefore, XXX successfully copied the tube radio station according to foreign lines, and XXX's experience is XXX's experience.
The existing textbooks and professional books at home and abroad have no specific solutions, and the relevant contents are the same. Now everything from security walkie-talkies to people's mobile phones, as well as hot-fried wireless tag high-frequency read-write cards, military communication stations and RF power chips are imported, and others will not tell you their theory and technical know-how.
I hope someone can turn these handwritten materials into electronic documents for free. The teaching device of high-frequency power amplifier designed and manufactured by ourselves, in order to be intuitive and avoid damaging the magnetic core when students adjust, tries to use ceramic skeleton instead of closed coil. The manufacturers of this ceramic skeleton are: No.999 Factory and No.897 Factory of the former Fourth Machinery Department (Ministry of Radio Industry) in Jingdezhen, Jiangxi.
The core significance of my above work is that there are various accurate test methods, and the parameters and working conditions of the circuit can be tested and adjusted by common instruments according to the prescribed steps, and the test is orderly, measurable and comparable in graphics. However, the popular saying that the distribution parameters of high-frequency circuits are complex and the performance of high-frequency circuits depends on the structure and shape is not really reflected.
At present, the popular circuit simulation software and integrated circuit design software can not truly reflect the working state of the actual circuit. Only with correct circuit test and adjustment basis can we make the best RF integrated circuit by changing the layout of integrated circuit and semiconductor technology.
In the 2007 National Electronic Design Competition for College Students, I instructed the contestants to adopt wireless transmitting and receiving circuits with discrete components. And XXX used imported wireless modules, and the whole army was wiped out.
We should be able to explain the basis of a design from many aspects, especially why we should do it, and have strong language expression ability, rigorous conception and precise manual technology in engineering technology.
More than twenty years ago, I broke the way that teachers taught by books. Instead, students randomly ask questions and then solve them together. Because the laboratory generally has no working conditions, so I will give a comprehensive answer.
Xxxx students like to answer questions on the spot in the experimental class and when doing graduation thesis, and they can solve difficulties immediately. Most of my unprepared questions can be answered accurately at a rapid pace.
This is the ability to accurately grasp and inspire students (tí hú guàn dǐng), so that students can understand the classroom content thoroughly and have a high level. Even the explanation of a basic concept will open your eyes and make you suddenly enlightened.
Now, as far as XXX is concerned, as far as the most basic design ability of a diode circuit is concerned, it does not exceed 10 small components. In the aspects of low noise, low power consumption, switch state, low current switch, high current switch, high speed switch, low speed switch, high frequency small signal, high frequency, high efficiency and high power, high power supply voltage, low power supply voltage, AC coupling, DC multilevel coupling, compound passive logic operation, integral blocking processing, differential processing skills, transient response, extreme temperature environment, frequency domain characteristics, high reliability, etc. , its design and debugging skills are quite rich. I'm good at this. As soon as the students asked questions, my answers were endless, eloquent and tired, which was scarce at that time.
From {\\ lang 1033 ,} to {\ \ lang1033 {\ lang1033,} I was not allowed to ask XXX questions, so I answered most of his questions in the dormitory on the roadside for several months, and made specific statements in writing on the spot.
For another example, when XXX was doing the challenge cup experiment, XXX gave instructions three times every morning, noon and evening during the holiday of that year, and he achieved the expected goal without specific hands-on operation.
I designed and manufactured XXX according to the results of mathematical analysis. The mathematical modeling process took several months, and two students were instructed to complete it separately in the dormitory. Relevant information has been published on the website of the State Patent Office.
Let me give you a few examples; I have inspected the modern communication experimental devices produced by XXX, and the results are generally not good. While carrying out the hardware transformation, I also instructed the experimenters in XX Communication Laboratory and demonstrated the correct waveform synchronization method on the spot. In fact, the same is true of the basic experiment of digital circuits. Only by refitting or making oscilloscopes can the effect of waveform synchronization be improved.
The experience of digital circuit teaching practice, especially the experience of modern communication teaching, is that the synchronous operation of eye diagram observation should be supported by an independently designed hardware synchronous circuit.
For frame synchronization signal, the synchronization of analog modulation and digital modulation of various frames is its concrete embodiment.
In modern communication, the synchronization effect of modulation process and demodulation process directly affects students' perceptual knowledge of modern communication principles; However, the phase, delay and channel conditions between modulation and demodulation are uncertain parameters. In order to accurately show their logical relationship under synchronous conditions, they must be designed and manufactured by themselves. At present, there are no ready-made products that can be used directly, right?
Moreover, all the design materials, debugging experience, component materials, assembly drawings, wave diagrams, purchasing and processing locations and methods, technologies and prices should be provided to students in electronic format, so as to provide an outstanding platform for students to show their talents in Shining on You.
One teaching method is that the values of the main components of the circuit can be changed linearly independently, instead of clicking and pulling with the mouse. For example, in the exam, we should be able to calculate the relevant values according to the predicted direction, and calculate them with formulas, which can change the shape and verification of the eye diagram. The textbooks of Massachusetts Institute of Technology have been published online. Only by passing the exam can they be skilled in system integration, instead of challenging their masters from the bottom.
One test method of teachers' teaching is to use the existing teaching materials outside the classroom and laboratory to produce test questions. Can you tell me the maximum and minimum range of this component? Is there a calculation basis?
A * * * knowledge at home and abroad is that in the world-leading research, there must be unique, top-class and self-made instruments and equipment; Relying on the existing commercial instruments in the market, we can't distance ourselves from our competitors. Behind the scientific and technological level of advanced countries is the support of advanced experimental equipment.
One of the criteria for undergraduate evaluation is the self-made rate of teaching instruments, the design drawings of teaching instruments, the working principle, the integrity and openness of test data, the advanced technology compared with existing commercial instruments, and the intuitive teaching. My homemade instrument is reliable, maintainable, testable and supportable.
An assessment standard for teachers and laboratory personnel is to be able to maintain the comprehensive logistics capabilities of the laboratory such as water supply, drainage, power supply, furniture, doors and windows, lighting and locks. Now teachers invite maintenance workers for a trivial matter, which consumes a lot of social resources. This little thing can't be done, let alone designing and making teaching instruments. Do I need an electrician's license to change the lights? Is it easy to get a certificate?
Education in China should always serve proletarian politics, combine with productive labor, focus on political and economic construction, and attach importance to the fundamental interests of the country.