As users' expectations for voice clarity and noise management for devices such as smartphones, laptops, and tablets continue to increase, especially in the rapidly expanding VoIP market, designers face extremely complex voice management design challenges. This article will highlight the key features, application benefits, and development support of ON Semiconductor's BelaSigna® R262 voice capture and broadband noise reduction system-on-chip (SoC) solutions for these applications, helping them design clear wherever and how they communicate. Very attractive device for voice. This article refers to the address: http:// Characteristics of the BelaSigna® R series The ON Semiconductor BelaSigna® R Series Voice Capture SoC is designed to address the acoustic design challenges of voice communications in noisy environments. The first product in the R series is the BelaSigna® R261 with dual microphones. It supports dual microphone direct input. The noise reduction algorithm is built into the integrated ROM memory. The application controller based on digital signal processor (DSP) structure provides high performance. Ultra-low power consumption, dual-channel analog output, and digital microphone output support. The new BelaSigna® R262 is an upgrade to BelaSigna® R261 that offers higher performance and is easier to use. The device also integrates DSP, voltage regulator, phase-locked loop, level shifter and memory. It is packaged in a tiny WLCSP package with a footprint of less than 6 mm2. The required board space is less than the usual external components. A significantly larger competitive program. This simplifies and speeds up the design process and helps engineers achieve the challenging goals of reducing design size. Figure 1: BelaSigna® R262 uses advanced real-time adaptive speech processing to provide up to 25 dB of noise reduction BelaSigna® R262 uses an advanced dual-microphone real-time adaptive speech extraction algorithm that extracts speech signals without prior knowledge of the source or microphone location. This algorithm utilizes global optimization criteria and works in the frequency, time and space domains to provide 25 dB of noise suppression. It can separate the required speech and environmental noise in real time, while ensuring natural sound quality and effectively matching various qualities. The microphone works. BelaSigna® R262 provides full 8 kHz wideband voice capture for VoIP communications, eliminates reverberation, and supports 360° voice pickup for a wide range of applications. Key advantages of BelaSigna® R262 BelaSigna® R262 has key advantages such as ease of integration, efficient voice capture and design flexibility. First, the device is an off-the-shelf solution that can replace a single microphone with two microphones directly connected to the audio input, supporting 5 mil (thousandths of an inch) linewidth traces and line-pitch printed circuit boards ( PCB) and pin-compatible with BelaSigna® R261 for easy migration to existing products using BelaSigna ® R261. Secondly, the device supports conferences, mobile phone calls and a variety of use occasions to capture voice effectively. 1) In conference mode , the BelaSigna® R262 captures speech up to 6 meters away while attenuating noise and eliminating reverberation. This device supports 360° free movement in conference mode, providing great flexibility and convenience. This mode is suitable for mobile phones in notebooks, tablets and hands-free mode. 2) In mobile phone mode , BelaSigna® R262 supports the creation of virtual “bubbles†around the device, which significantly reduces noise; and supports free movement of the phone around the mouth without degrading performance. This mode is suitable for mobile phone call mode. 3) One-arm mode is suitable for notebooks and tablets in private chat mode. This mode balances the noise reduction and the speech capture distance. The third key advantage of this device is its flexible design, which is mainly reflected in the industrial design or microphone model of the product. BelaSigna® R262 is not only compatible with a wide range of microphones, but also has no constraints on the layout of the microphone or the industrial design of the product. This device not only supports dual microphone noise reduction, but also provides the same performance as using two microphones with one microphone. In addition, this device has broadband processing support and supports Skype VoIP calls. In addition, BelaSigna® R262 offers the advantages of extremely small size and low energy consumption. The SoC is available in a tiny WLCSP package (both 26-bump and 30-bump) in a size of approximately 2.233 mm x 2.388 mm (approximately 5.34 mm2) for easy integration into industrial designs for end applications. Among them, the full 30-bump package version provides full functionality, including EEPROM read bypass, suitable for 3 or 2 mil trace/line pitch PCB; 26 bump package version reduces I/O selection, no hardware reset Pin, only 1 analog output, suitable for 5 mil trace/line PCB. The device operates from 1.8 V to 3.6 V and provides very low power consumption, with a current consumption of only 17 mA at 3.3 V full load and only about 40 μA in standby mode. This low power consumption helps extend the battery life of portable devices without compromising performance. BelaSigna® R262's rich hardware and software development support A schematic diagram of the application of BelaSigna® R262 is shown in Figure 4. To help customers develop, ON Semiconductor also offers a wide range of evaluation hardware, including customer prototype platforms (CPP), analog demonstration boards, prototype modules, and communication accelerator adapters (CAAs). Among them, the customer prototype platform contains more functions, using the onboard MEMS microphone or plugged into the customer's own microphone, self-powered with onboard AAA battery or the designer's own power supply, to support the complete evaluation of BelaSigna® R262. The portable battery-powered analog demo board measures 52 mm x 25 mm x 20 mm and the stereo output shows two simultaneous applications that can be plugged into any standard microphone input and is suitable for evaluating the performance of the BelaSigna® R262. The prototype module measures 22 mm x 6 mm, has an onboard 2.048 MHz oscillator, provides a simple 3.3 V supply and is connected to the output, provides analog and DMIC outputs, and is suitable for designing prototypes to evaluate BelaSigna® R262. In addition, the high-speed USB interface to the BelaSigna ® chip is used for development, debugging and programming during production. In addition, ON Semiconductor offers intuitive, easy-to-use Windows applications that support all BelaSigna® R-series chips, allowing designers to configure BelaSigna ® R262 on-site, enabling diagnostic tools to be run during the design selection process, and can be configured according to the designer. The change regenerates and retransmits the customized EEPROM status parameters. summary: BelaSigna® R262 is a unique off-the-shelf solution for communications equipment with extremely complex voice management design challenges. As customers' expectations for voice clarity and noise management continue to increase, especially in the rapidly expanding VoIP market, it is especially important for designers to get technologies like ON Semiconductor's BelaSigna® R262 to help them design attractive Voice communication devices provide clear voice effects wherever and how they communicate, helping to optimize the user experience. Pay attention to ON Semiconductor's official WeChat to learn more innovative and energy-efficient solutions To satisfy the increasing demand of PoE for Fast Ethernet (FE) networking, N-net has developed this series of PoE FE switch. The managed fast Ethernet POE Switch provides an ideal solution for web-smart LAN implementation. This product is equipped with 10/100Base-TX Fast Ethernet RJ45 ports, supporting IEEE 802.3at standard, and 2 1000Base-X SFP ports. 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