The main purpose of the high-frequency generator is that it creates oscillations of the electric field. The range of these oscillations has rather wide boundaries: from several tens of kilohertz to hundreds of megahertz.
General description of the RF device
Most ordinary people use this device to stop the counter. A high-frequency generator is really capable of stopping the operation of such a technique, creating oscillations. In addition, this appliance can also be used as power for ordinary household appliances. If we talk about power, the output voltage reaches 220 A, and power - 1 kW. It is also possible to replace some elements with more powerful ones. If this is done, then the output characteristics of the high-frequency generator will increase, and with its help it will become possible to power a larger number of units or several, but more powerful ones. The connection of the HF itself is carried out to a normal household network. It is important to note here that the circuit of electric wires is quite simple, and there is no sense in changing it in any way. In addition, there is no need to use a grounding system for this device. When connecting such oscillating units to the network, they do not completely stop the counter. The unit continues to operate, but only 25% of the actual energy consumption is kept account.
Device action
If we examine in more detail the operation of a high-frequency generator, then the equipment stops due to the fact that a capacitor is used in the device circuit. The connection is carried out precisely to this part, which has a charge that fully coincides with the sinusoidal voltage flowing in the network. The implementation of the charge occurs through pulses with a high frequency. Thus, it turns out that the current that the consumer spends from his home network becomes a high-frequency pulse. Conventional electronic meters installed in houses are characterized by a lack of sensitivity to such vibrations. This means that the unit will take into account the pulse current consumption with a negative error.
Circuit description
The high-frequency generator circuit is characterized by the presence of certain key elements. These include: rectifier, capacitance, transistor. Further, if we talk about connecting a capacitor, then it is sequentially included in the circuit with a rectifier. This is necessary so that while the rectifier is working on the transistor, the capacitor can be charged up to the size of the voltage that is available in the network.
Most often, the capacitor charging limit in a high-frequency generator becomes 2 kHz. If we talk about the voltage that is currently present on the load and the capacitance of the device, then it approaches the sine of 220 V. In order to limit the current flowing through the transistor while the capacitance is charging, the circuit has a resistor that connects to cascade key using serial connection.
Features of the RF
The generator runs completely on the logic elements. It produces oscillations or pulses with a frequency of 2 kHz, as well as with an amplitude of 5 volts. There is also a characteristic such as signal frequency. The value of this parameter is determined by the elements C2 and R7. In standard notation schemes, such a signature format is used. The properties that these elements give can be applied in order to set the maximum error in accounting for energy consumption. For the creation of pulses are responsible for such elements as T2 and T3 - transistors. Together they are called the impulse maker. This part is also responsible for the correct operation of the transistor T1.
Devices such as a rectifier, transformer and others are used as a small power supply. The main task is to supply energy for the microcircuit to work with other elements. These small power supplies are typically rated at 36 V.
High-frequency signal generator G4-151
The main purpose of such a generator is to configure, verify, adjust and test radio devices. With the help of this device, it is possible to measure the amplitude-frequency characteristic, sensitivity, selectivity, etc. In addition, this equipment can be used as a signal source, which works with different methods of modulation of oscillations. It can be amplitude, frequency or pulse modulation. It is also possible to create unmodulated oscillations. Most often, such equipment is used in testing bodies, in equipment repair workshops, in workshops or laboratories.
The output of information from this high-frequency signal generator is a regular digital code. In addition, for ease of control, there are analog inputs that allow you to remotely adjust all the parameters of the device.
DIY assembly
Since assembling a real high-frequency generator circuit with your own hands can be difficult, there is a somewhat simplified assembly option. In this case, instead of a transistor, an element with a negative resistance will be used in the circuit. Still, such elements are often called amplifying. In quite simple words, the current at the output of such devices is always greater than the current at their input.
An oscillatory circuit is connected to the input of such a device. Further, it is very important from the output of the same amplifier through feedback that you need to connect it to the same oscillatory circuit. By connecting the circuit in this way, you get the following result. A current of a certain value enters the input, passing through the amplifier element, it increases, which feeds the loop capacitor. With the help of feedback, the already amplified current is returned again to the input to the circuit, where it is again amplified. Such a circular process is ongoing. It is he who causes undamped oscillations inside the generator.
Tube RF
One of the varieties of high-frequency signal generators is tube devices. Such devices are used in order to obtain plasma with the desired parameters. To do this, bring a certain discharge to the power of the device. For such devices, the key elements are emitters, the operation of which is based on the principle of power supply.
Power amplifiers have become another important element for the operation of tube RF. These parts mounted on lamps are used to convert direct current to alternating current. Naturally, the operation of a tube generator is impossible without the lamp itself. You can use various elements. The tetrode GU-92A became quite common. This part is an electronic lamp for the operation of which four elements are used: anode, cathode, shielding and control grid.