China Zhongshi Zhihui Technology (suzhou) Co., Ltd. Company News

Main prevention and control measures for electromagnetic interference in the PCB wiring of power amplifier module and circuit:1. Reduce input impedance.Electromagnetic waves are mainly picked up by wires and PCB board wiring, and under certain conditions, the electromagnetic waves picked up by wires can be considered as constant power. According to the derivation of P=U ^ U/R, the induced voltage is inversely proportional to the square of the negative value, indicating that achieving low impedance in amplifiers is beneficial for reducing electromagnetic interference. For example, if the input impedance of an amplifier is reduced from 20K to 10K, the induced noise level will decrease to a level of 1/4. Active speaker audio sources mainly include computer sound cards, portable speakers MP3, This type of audio source has strong carrying capacity, and appropriately reducing the input impedance of active speakers has a very weak and difficult to detect impact on sound quality. During the experiment, the author attempted to reduce the input impedance of active speakers to 2K, but did not feel any changes in sound quality, and long-term operation did not show any abnormalities. 2. Enhance high-frequency anti-interference capabilityIn response to the fact that most stray electromagnetic waves are mid to high frequency signals, a magnetic capacitor is added to the input of the amplifier to ground. The capacitance value can be selected between 47-220P, and the frequency inflection point of the capacitor with a capacitance value of several hundred picofarads is two to three orders of magnitude higher than the audio range. The impact on the sound pressure response and listening experience within the effective listening frequency range can be ignored. 3. Pay attention to the installation method of the power transformerUse high-quality power transformers, try to widen the distance between the transformer and PCB, adjust the orientation between the transformer and PCB, and keep the transformer and amplifier sensitive end away from each other; The interference intensity of El type power transformers varies in different directions. It is important to avoid aligning the Y-axis direction with the strongest interference intensity with the PCB as much as possible. 4. The metal casing must be groundedFor HIFI independent amplifiers, products with design specifications have an independent grounding point on the chassis, which is actually reduced by the electromagnetic shielding effect of the chassis to reduce external interference; For common active speakers, the metal panel that also serves as a heat sink needs to be grounded; The casing of the volume and tone potentiometer should be grounded as much as possible if conditions permit. Practice has proven that this measure is very effective for PCBs working in harsh electromagnetic environments. Signal Power Amplifier manufacturer from China

In the electronics manufacturing industry, time-to-market and production efficiency are critical for success. The process of designing and building a complex device like a signal jammer from scratch can be time-consuming and costly. So, how can a high-performance Signal Jammer Module simplify your manufacturing process and give you a competitive advantage? The answer is through a modular design and a focus on integration. Our Signal Jammer Module acts as a pre-engineered, drop-in solution that handles the most complex part of the jammer's functionality. This provides several key benefits for manufacturers:   Reduced R&D Costs and Time: You don't need to spend months or even years developing the core jamming technology. Our modules are ready to be integrated, allowing you to focus on the final product's enclosure, power supply, and user interface.   Simplified Assembly: The standardized form factor and clear interfaces make assembly simple and fast. This reduces labor costs and allows for a more streamlined production line.   Scalable Production: Whether you need to build a single prototype or thousands of units for a large contract, our modules allow you to scale your production quickly and efficiently without a complete redesign.   Consistent Quality: By using our pre-tested and certified modules, you can be confident that every unit you produce will have the same high level of performance and reliability.   By choosing our Signal Jammer Module, you are making a strategic decision to streamline your manufacturing process, reduce your costs, and bring a high-quality product to market faster.

Many people think of a signal jammer as a simple device that blocks signals, but for high-security or professional applications, the reality is far more complex. The difference between a consumer-grade gadget and a professional-grade system is the quality and performance of its core. So, what exactly makes a Signal Jammer Module the heart of a professional-grade system? The answer lies in its engineering. A professional Signal Jammer Module is a precision-engineered piece of hardware that guarantees reliability, efficiency, and consistent performance. Here's why our modules are essential for professional systems:   Clean Signal Generation: Our modules are designed to produce a clean, stable, and highly effective jamming signal that minimizes interference with other electronics and ensures maximum jamming power on the target frequency.   Thermal Management: High-power jamming generates significant heat. Our modules feature advanced thermal management and a compact design, allowing for the creation of powerful systems that can operate continuously without overheating.   Power Efficiency: We optimize our modules for power efficiency, which is critical for systems that run on batteries or require continuous operation. This ensures a longer runtime and a more reliable system.   Built for Integration: Our modules are designed for easy integration, with standard interfaces and a robust design that simplifies the assembly process. This allows manufacturers to build reliable, high-quality products faster and more efficiently.   By building your system with our Signal Jammer Module, you are ensuring that your final product meets the highest standards of performance, reliability, and security.

In today's world, wireless threats are constantly evolving. A static, single-purpose jamming system may have been enough in the past, but with a growing number of communication frequencies and new technologies, adaptability is key. So, how can you ensure your jamming system is ready to face modern threats and future-proof your security? The answer lies in the core of your system: the Signal Jammer Module. A Signal Jammer Module is a modular, high-performance component designed to generate specific jamming signals. It is the building block that allows for a truly flexible and scalable solution. Our modules provide the adaptability you need for several reasons:   Frequency Agility: Each module is designed to target a specific frequency band, such as 2G/3G/4G, Wi-Fi, Bluetooth, or GPS. By selecting and integrating different modules, you can create a custom jammer that addresses a wide range of threats simultaneously.   Scalability: The power and range of your jamming system can be easily adjusted. You can start with a few modules for a small, portable jammer and add more to cover a larger area, all without replacing the entire unit.   Rapid Deployment: When a new threat emerges, you don't need to redesign your entire system. Our modular design allows you to quickly integrate a new module to counter the new frequency, ensuring your security is always up-to-date.   By choosing our Signal Jammer Module, you're not just buying a component; you're investing in a future-ready, adaptable, and professional-grade security solution.

At present, there are usually two types of power amplifiers on the market, one using Polar loop structure and the other using power reversal method. The first structure has a higher power added efficiency, but requires power detection and a complex feedback network to adjust the output phase and amplitude of the power amplifier, resulting in a complex design, high cost, and large chip area. The second structure is simple to implement, low in cost, small in chip area, but has the disadvantage of high static current and low efficiency. Suzhou Innolux Technology has adopted the second solution to achieve high efficiency in power addition, resulting in a small module area of 6mm6mmLGA packaging. At the same time, by optimizing the output matching network of the power amplifier and the static current of the power amplifier in the design, the disadvantages of the second scheme were improved as much as possible. In fact, the static current of RDA6216 is very low in EDGE mode, with a static current of 150mA in GSMEGSM frequency band and 85mA in DCSPCS frequency band. It also has a high maximum linear power added efficiency, with 28% in GSM/EGSM frequency band and 29% in DCS/PCS frequency band. Signal Power Amplifier manufacturer from China

In the world of security and electronic countermeasures, the ability to control and neutralize unwanted wireless signals is paramount. While a complete signal jammer unit is the final product, its effectiveness is entirely dependent on its core component: the Signal Jammer Module. But why is this small, specialized component the very heart of a powerful jamming system? A Signal Jammer Module is a self-contained electronic circuit board designed to generate and transmit a specific type of radio frequency (RF) signal. It is the core technology that actively disrupts communication signals within a defined range. These modules are not the final product; rather, they are the building blocks that system integrators use to create custom jamming solutions for a wide range of applications. This module is essential for several key reasons: Tailored Solutions: A modular approach allows for the creation of multi-band jammers. By combining several modules—each targeting a specific frequency like Wi-Fi, cellular, or GPS—system designers can create a single, powerful jammer that meets precise security requirements. Scalability: The power and range of a jamming system can be easily scaled by simply adding or removing modules. A small, portable jammer for a vehicle can be built with a few modules, while a large, high-power system for a building or prison can be built with many. Efficiency and Reliability: Each module is designed to be highly efficient and reliable, ensuring stable signal generation and consistent performance. This is crucial for applications where security cannot be compromised. Streamlined Manufacturing: The use of pre-built modules simplifies the manufacturing and assembly process for end-product manufacturers, ensuring a faster time-to-market. In short, a Signal Jammer Module is the essential, specialized component that provides the power, flexibility, and reliability needed to build a custom, effective, and professional-grade signal jamming solution. https://www.signalpoweramplifier.com

   The stability of the amplifier in a circuit is determined by the noise gain, not the signal gain. Most modern op amps are stable at unity gain, but some special purpose amplifiers cannot do this. Compared to standard unity-gain stabilized op amps, non-fully compensated op amps provide unique advantages, such as lower noise voltages and wider bandwidth. So, in which case should noise gain be dealt with?    Imposing noise gain can bring benefits to a variety of applications. For example, to take advantage of one or more characteristics, you may need to use a non-fully compensated amplifier below its minimum stable gain. Normally it will not work, but handling the noise gain can "fool" the amplifier into thinking it is operating at a higher gain. Another wonderful benefit of imposing high noise gain is that it improves the stability of the amplifier when driving capacitive loads.    Depending on the situation, imposing noise gain usually requires adding a resistor or a capacitor to the circuit. It may be as simple as adding a resistor between the inverting and non-inverting inputs, adding a series RC circuit between the inverting input and ground, or connecting the component in parallel with the input or gain resistor.

The circuit principle of RF power amplifier is that the directional coupler at the output end of the transmitter power amplifier detects the reverse power voltage output. After being processed by the relevant circuits in the power amplifier stabilizing power supply, it is sent to the transmitter control circuit XP1/12A. Then, after passing through the reverse power detection voltage compensation circuit, it is added to the N20B amplifier, which is then added to the in-phase input terminal of N20A. When the voltage at this input terminal reaches about 300mV (when the power amplifier output and antenna impedance are mismatched, the voltage standing wave ratio is greater than 2.5:1), the output voltage of N23A is greater than 6.2V, causing the VD5 voltage regulator and V3 to conduct. V3 conduction causes VD6 conduction, which lowers the level of the in-phase input terminal of N23B and the voltage at the output terminal of N23B. As a result, the DC control voltage applied to the Vx input terminal of the analog multiplier N24 drops to a certain level, ultimately reducing the output power of the RF amplifier to a certain value and protecting the RF amplifier. When the voltage standing wave ratio is not greater than 2.5:1, the reverse power detection voltage is small, and the voltage output by N23A is not enough to make VD5 conductive. Therefore, the circuit VD6 of the RF power amplifier is also turned off due to reverse bias. Only the normal power DC control voltage set on the front panel is applied to the N23B in-phase input terminal, and the voltage applied to the input terminal of the analog multiplier Vx is also normal. The transmitter RF power amplifier outputs power normally.

In the era of information, the influence of automatic identification technology is even more important today. As the ancestor of automatic identification, bar code technology has long been unable to cope with the rapid demand for information automation today. As a novel information technology, RF power amplifier technology has emerged, fully leveraging the technical advantages of automatic identification. In practical applications, UHF(915MHz) radio frequency identification technology is sensitive to water-containing substances and cannot be used in humid environments. This is because the UHF signal has a high frequency and short wavelength, and is easily absorbed by substances with a large water content, resulting in energy weakening and a sharp decline in performance. However, long-distance HF(13.56MHz) radio frequency identification signals have low frequencies and long wavelengths. Therefore, the design of RF power amplifier modules has become the most important aspect of the development of RF communications.

The operating frequency of RF power amplifiers is very high, but the relative frequency band is narrow. RF power amplifiers generally use frequency selection networks as the load loop. RF power amplifiers can be divided into three types of working states: A (A), B (B), and C (C) according to different current conduction angles. The conduction angle of the current of the Class A amplifier is 360°, which is suitable for small signal and low power amplification. The conduction angle of the current of the Class B amplifier is equal to 180°, and the conduction angle of the current of the Class C amplifier is less than 180°. Both Class B and Class C are suitable for high-power working states, and the output power and efficiency of Class C working state are the highest among the three working states. Most RF power amplifiers work in Class C, but the current waveform of Class C amplifiers is too distorted and can only be used for resonant power amplification using a tuned loop as a load. Because the tuning loop has filtering capabilities, the loop current and voltage are still close to sinusoidal waveforms, with little distortion.