Function generator on a logic chip. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Measuring technology
Comments on the article
The function generator on a logic chip is designed to tune and test low-frequency equipment, allowing you to obtain a number of fixed frequencies (32 in total). In the first subband receive frequencies 20; 27; 36; 47; 63; 84; 112 and 150 Hz. In the second, third and fourth, respectively, ten, one hundred and one thousand times higher.
(click to enlarge)
At the generator output - KZ-K6 connectors - they receive all the necessary voltages to check all stages of the AF amplifier - the output stage, from the pickup input, microphone input. To generate rectangular and triangular pulses, a closed relaxation system of an integrator and a comparator is used in the generator, and a sinusoidal voltage is obtained by converting triangular pulses.
The comparator is made on two elements of the Dl chip (D1.1 and D1.2). An integrator is built on transistor V3, element D1.3 and capacitors C1-C4. Element D1.4 and diodes V4 and V5 are used to convert the voltage of a triangular farm into a sinusoidal one.
The generator used resistors MLT, MT, capacitors MBGP-3, MBM, K50-3, K50-6, K40P-2, KSO. The resistances of resistors R6, R9-R15 and the capacitance of capacitors C1-C4 must be selected with an accuracy of 5%. Trimmer resistors SPZ-1B.
The generator is adjusted using an oscilloscope. Switch S1 is set to the lowest position corresponding to the highest frequency, and switch S2 to the middle position. The oscilloscope is connected to the X4 socket and the presence of rectangular oscillations is checked. The upper level should correspond to 3,5 ... 3,7 V, and the lower one - 0,2 V. If this is not observed, check the voltage in socket X2. If the level is low - 0,2 V, reduce the resistance of the resistor R1 and vice versa. The symmetry of the sawtooth oscillations is achieved by selecting the resistor R8 *, and the sinusoidal oscillations - by the resistor R23.
See other articles Section Measuring technology.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
Machine for thinning flowers in gardens
02.05.2024
In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers.
... >>
Advanced Infrared Microscope
02.05.2024
Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>
Air trap for insects
01.05.2024
Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>
| Random news from the Archive New Mobile Intel Processors
23.01.2012
The list of Intel processors includes the Core i5-2450M and Core i3-2370M models, which were "lit up" in the documentation for Dell laptops and on the Intel website back in November last year.
These processors are dual-core, with support for Hyper-Threading. The clock frequency of the i3-2370M is 2,4 GHz. The Core i5-2450M is clocked at 2,5GHz, but it can go up to 3,1GHz. Processors equipped with 3MB L35 cache have a TDP of 225W and cost $XNUMX each. The remaining six models do not support Hyper-Threading and Turbo Boost.
The single-core B720 and dual-core B815 also have a TDP of 35W and 2MB cache. Clock speeds are 1,7 and 1,6 GHz, prices are $70 and $86.
Models Mobile Celeron 797 and 867 belong to the category of processors with low power consumption - their TDP does not exceed 17 watts. The single-core Mobile Celeron 797 runs at 1,4 GHz and has 1,5 MB of cache. The dual-core model Mobile Celeron 867 is designed for a frequency of 1,3 GHz and has 2 MB of cache. These processors cost $107 and $134 respectively.
The list is completed by Pentium 977 (two cores, 1,4 GHz, 2 MB cache, TDP 17 W) and Pentium B970 (two cores, 2,3 GHz, 2 MB cache, TDP 35 W). The second model is priced at $125. There is no data on the price of the first.
|
Other interesting news:
▪ Mold on walls causes hallucinations
▪ SAMSUNG introduced a line of giant TVs
▪ Greenhouse in which it is cool
▪ Poverty and stress remain in the genes
▪ Earth's climate is changing
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the site Life of remarkable physicists. Article selection
▪ article Thyristors and dinistors. Directory
▪ article Which country first had a flag? Detailed answer
▪ article Engineer-designer in construction. Job description
▪ article Amplifier on the chip TDA1518, 2x11 watts. Encyclopedia of radio electronics and electrical engineering
▪ article Electronic fuse with digital indicator. Encyclopedia of radio electronics and electrical engineering
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese