DTT-X V2.0 Algorithm-paired transistor tracer

Description: Traditional transistor tracers are mainly used to measure and display the characteristic curves of transistors. However, in actual applications, in addition to seeing the basic characteristics of the transistor, it is usually necessary to pair them or understand the application characteristics of the transistor in the circuit. Especially pairing is still very troublesome with traditional tracers.The most important feature of the DTT_X tracer is that it uses algorithms for pairing, which greatly improves the pairing efficiency; on the other hand, it uses numerical calculation methods and the real measurement data of the transistor to analyze the distortion characteristics of the basic amplifier circuit, which facilitates further understanding of the characteristics of the transistor.For example:To find out which transistors have a similarity of more than 95% from 100 transistors of the same model, you can use DTT_X to measure these 100 transistors in turn, set the minimum similarity to 95%, and then click pairing. The system automatically calculates the similarity and selects similar groups. The result may be that 8 similar groups are selected; each group has several transistors which are all similar more than 95%.It is very difficult to find paired transistors by measuring the curve using traditional methods and looking at the similarity with the naked eye.Moreover, DTT_X saves the measurement results in the database, and you can directly query and obtain this information when you need it in the future. DTT_X V2.0 is the main device of the tracer, with a built-in +/-36V switching power supply, main circuit board, high-power transistor test socket, and can be connected to an external ~110V-~220V AC power supply.The package includes a power cord and USB cable. Please download the application software, design and use documents from the following link. The application software can run on Win7/10, 64-bit operating system. Link: https://pan.baidu.com/s/1TNuhAebsNqkUnAgIKX6e-A Extraction code: qf69 The core algorithm principle can refer to the following link:https://www.cnblogs.com/suncand/p/15305938.html Simple measurement process of the tracerIf you are using this tracer for the first time, or just want to perform basic characteristic measurements on a transistor, you can follow the steps in the figure below to perform simple and quick measurements.\1. Select model: Select the appropriate transistor type in the "Select model" list box on the main interface. For example, select "BJT-N", and then a default BJT-N transistor will appear in the component list; \2. Select curve: The default curve "IbVbe" is displayed in the measurement curve->curve type list box, and the default conditions of the measurement curve are on the right. You can select the curve you want to measure in the curve type list box and adjust the appropriate measurement parameters \3. Measure: Insert the component into the measurement socket, make sure the pins are inserted correctly, and then click "Start". The device can measure a set of characteristic curves according to the measurement conditions.The application software includes several basic modules:\1. Pairing measurementThe basic operation process of pairing measurement is shown as follows.Select the model and create a transistora. Set the prefix of the transistor number to be tested, the starting number, and then create the numberb. Select the curve type, check the quick measurement, and adjust the measurement conditionsc. Insert the component, click Start, and measure the curved. Wait for the measurement to end, the system automatically creates the next number, and then click Start to measure the curve. Repeat this step until all transistor are measurede. Set the pairing conditions, click Pairing, and display the pairing results In addition to measuring the characteristics of a single transistor, you can also select an expansion board, set the status of 8 test sockets on the expansion board, and set the encoding rules. Use the set measurement conditions to measure the characteristics of up to 8 transistors at a time. \1. Pairing screeningIn the case of a large number of transistors that need to be paired, if you only use the calculation similarity function in the pairing measurement module to pair them one by one, the efficiency is relatively low. At this time, you can first use the pairing measurement module to batch measure the characteristics of the transistor, and then perform batch pairing in this pairing screening module.In this module, enter the same type of paired transistor model (note, not the transistor number here), or the complementary paired transistor model, and query all the transistor of this model in the database.As long as there is measurement time information for each transistor, it usually has measurement data. However, pairing also requires modeling of the measurement results of each curve and extracting model parameters. During batch measurement, not every transistor is modeled, so the transistor currently queried may have measurement information, but no model parameter information for pairing. In the pairing screening module, the model parameters of the transistor to be paired can be recalculated. It can be incremental, that is, only calculating pairing parameters for transistor without model parameters, or recalculating model parameters for all transistors.After confirming that all the transistors to be paired have pairing parameters, the lower and upper limits of the similarity can be set, such as a lower limit of 0.9 and an upper limit of 1, indicating that similar groups with a similarity between 0.9 and 1 are to be screened out.After clicking OK, the system can automatically group the transistor that meet the similarity. The transistors in each group (indicated by the transistor number) meet the similarity conditions.Here we can see the importance of numbering each transistor. You should ensure that the transistor number and the actual transistor can be associated with each other. Once the relationship between the number and the actual transistor is messed up, the number will be meaningless.Here it is recommended to prepare some cheap breadboards and insert the transistor in order on the breadboard. First number each breadboard, and then use the breadboard number + the serial number of the transistor on the breadboard to number the transistor. This is not easy to mess up. Moreover, the holes with the same serial number on the breadboard are connected, which is also good for protecting the transistor from static electricity breakdown.\1. Curve characteristicsWhen the mouse is in the drawing area, right-click to call up the curve operation menu. You can change the cursor shape, display the characteristics of the current point, etc. As shown in the figure below:The options of the right-click menu include:a. Show/cancel cross cursor: control the shape of the cursor.b. Parameters of the current point: display the parameters of the current point of the curve in a yellow information box. Depending on the type of curve, the displayed parameters are also different. Taking the IcVce curve as an example, it can display:1.a. Id: current component numberb. Vce: Vce value corresponding to the current pointc. Ic: Ic value corresponding to the current pointd. rc: dynamic resistance dx/dy of the current pointe. ib: measurement condition ib of the current pointf. Vbe: Vbe corresponding to the current ibg. HFE: current amplification factor of the current point \1. Distortion characteristic analysisFor the common emitter amplifier circuit of BJT, input the operating voltage, the expected operating point, the load resistance, the dynamic range of the input sinusoidal signal, select whether the base bypass capacitor is effective, and then the system calculates the gain and distortion of the circuit at a specific operating point and input signal amplitude based on the input and output characteristic curves of the transistor.The basic idea of calculating distortion is:a. Use the working point and load resistance to fit the load line on the output characteristic curve;b. Use the load line and input characteristic curve, emitter negative feedback resistor to fit the transfer characteristic curve of the circuit;c. Use the transfer characteristic curve to transform the input sinusoidal signal to obtain the output signal;d. Use FFT transformation to calculate the harmonic power in the output signal, divide it by the fundamental power to obtain the distortion; divide the fundamental effective value by the input signal effective value to obtain the gain of the circuit; For JFET and MOSFET, since there is no input current, the transfer characteristic curve of the transistor is already included in the characteristic measurement, and the distortion calculation process is slightly simpler. In the common source amplifier circuit composed of JFET and MOSFET, it is only necessary to revise the transfer characteristics of the transistor with the output load line and source negative feedback resistor to obtain the transfer characteristics of the circuit itself. Then use the transfer characteristics of the circuit to transform the input signal to obtain the output signal, and then perform FFT transformation on the output signal to calculate the gain and distortion of the circuit. \1. CalibrationThe calibration module is mainly used to calibrate the key quantities such as the output of Vg, the V-I conversion resistance of Ib, the output of Vc, and the parameters measured by Ic, i.e., the sampling resistance, in the hardware circuit.For the specific calibration principle, please refer to the description of the hardware circuit.\1. Parameter configurationThe parameter configuration module can configure the communication port between the application software and the hardware, the default measurement conditions of various predefined curves, the weight of each parameter during pairing comparison, etc.\1. Transistor information managementIn order to effectively use the plotter to manage transistors, it is recommended to consider the management method of transistor data. The most basic and important one is the encoding method of the transistor and the storage method of the transistor. This is the basis for distinguishing each transistor.

Price: 220 USD

Location: Beijing

End Time: 2025-01-30T04:43:14.000Z

Shipping Cost: 20 USD