The ability of digital electronic devices to quickly and accurately collect image, voice, and audio data from our surroundings and manage and control this data in the digital domain can lead to anytime and anywhere communication, thereby improving computational performance. Digital electronic devices also produce more reliable and cheaper medical electronic devices that bring exciting and interactive multimedia content to a wide variety of consumer devices. In general, these advances have placed the world we live in with digital control and management.
2. The simulation technology in digital electronic equipment plays a decisive roleThe advantages trusted by digital technologies in digital electronic devices can only be realized when they are as good as analog technologies, and their analog technologies can correctly restore the digital signals represented by “1†and “0†to human beings who can hear and see. The analog signal to, feel, or sense. Without significant and simultaneous analog technology innovation, the effects of the digital revolution may be overshadowed. The more information we have digitally captured, the more data we have to convert and restore - whether it is real-time voice transmission, audio signals or video images. Today, cellular phones, such as cellular phones, are continuously decreasing in size and feature sets, the sound quality of high-end car audio systems, and high-definition (HD) images of broadcast digital TVs are not only intelligent circuit design, advanced manufacturing processes, and high-performance digital processing. The product of technology is also a product of continuous innovation in analog design. For example, high-speed digital signal processors (DSPs) enable digital audio receivers to increase their performance by adding multiple audio channels. However, each new channel requires a separate power amplifier to drive the output signal in a manner that is easily recognizable and comfortable to the human ear, as shown in FIG. 1, for which the following is explained.
2.1 Figure 1 shows an all-digital audio component and digital + analog audio solution.
Figure 1 is its block diagram
In order to meet the needs of today's digital audio device market design, the solution of full digital audio components and digital ten analog audio in Figure 1 is adopted. The superiority of the programmable component performance and the applicability of the design allow the designer to construct an audio system with more functions and a more realistic sound experience at a more competitive price. Its analog + digital signal processing (DSP) solutions can be industry-leading digital signal processing (DSPs), high-performance analog device-to-logic, extended application software portfolio, all from the most complex to the simplest audio design Give the most reliable, accurate, and efficient solution.
The rapid growth of digital electronic devices actually pushes the demand for analog ICs. In many cases, new digital products require high levels of integration and high-performance analog ICs to be able to convert (see Figure 2 high-performance 24-bit, dual/quad stereo audio analog-to-digital converters), conditioning and stability Signals as well as control and power to the link determine today's advanced system capabilities.
2.2 High-performance 24-bit, dual/quad-channel stereo audio analog-to-digital converter (ADC) PCM4202, PCM4204 main features.
Figure 2 shows the block diagram of PCM4202 and PCM4204
The PCM4204 is a high performance, quad ADC designed for professional audio applications. It supports 24-bit linear pulse code modulation (PCM) output data with a sampling frequency of up to 216 kHz. It can also be configured to output 64- or 128-times oversampled single-bit direct-flow digital (DSD) data for both channels. The PCM4204 is also ideal for DVD Audio and Super Audio CD (SACD) recording applications.
Applications: Can be used on professional studio equipment and DVD Audio and Super Audio CDs (SACD).
In fact, due to analog technology innovations, consumer terminals have acquired many features in digital products. Here's an example from the application of trends.
3. Observations from the Application Trends Analog Simulations Driven and Determined the Future of Digital Technology3.1 Advances in Data Converter Technology Drive Digital Camera (DSC) Performance Improvements
Although advances in DSP and microcontroller (MCU) processing technologies have digitally provided the required bandwidth for fast image processing, the quality of those images depends on the digital camera analog front-end (see Figure 3 for a DSC block diagram). The ability of the high-performance data converter (ADC) to reduce noise and increase dynamic range. Advances in data conversion technology have also allowed the AFE to solve other common performance problems. For example, reducing power consumption to extend battery life, increasing analog-to-digital conversion sampling rates to increase camera shutter speeds, and improving image sensor photosensitivity To reduce the high-resolution camera flash requirements.
Figure 3 shows a block diagram of a digital camera. It can be seen from Figure 3 that the camera analog front-end (AFE) and high-speed ADC will make a breakthrough in DSC performance improvement.
In addition, analog technology innovation not only improves the performance of digital cameras, it also helps to produce a variety of new digital camera designs. For example, analog technology and Micro-Electro-Mechanical System (MEMS)-based sensors are combined to avoid camera blurring by adding gyros and data conversion techniques to compensate for camera "bounce."
3.2 Audio codec in digital audio processing is the key to the full play of DSP performance
Whether dealing with Dolby 5.1-channel surround sound in home theater applications or 12-channel audio in high-end automotive systems, today's audio signal chain is increasingly digitized. However, in reality, the signal chain is only nominally "all-digital" because of the large number of multi-channel audios that impose new performance requirements on analog technology. For example, there are inherent digital signal processing challenges in multi-channel digital audio architectures that require design engineers to use multiple high-performance analog power amplifiers to drive the speakers (as seen in Figure 4) and audio codecs capable of converting analog audio signals. , can not sacrifice, or say "give up" DSP performance.
3.21 Dolby 5.1-channel surround-sound home theater AV receiver.
Figure 4 is a block diagram of an AV receiver
The AV terminal device can use DVD audio and SACD high-quality audio format formats and not only provide the highest performance, but also provide customers with the most economical solution. . The Aureus audio DSP provides processing power for various audio decoding formats; Burr-Brown audio data conversion products support all-round performance while supporting the highest-end and cheapest systems. From Figure 4, it is shown that it uses multiple high-performance analog power amplifier - stereo digital power conditioning amplifier controller TAS5182 (for analog amplifiers with higher performance) to drive speakers and audio codec PCM1850 that can convert analog audio signals. Therefore, the home theater AV receiver has a high-speed transmission rate with excellent analog characteristics throughout the entire audio signal path.
3.22 Stereo Digital Power Adjustment Amplification Controller TAS5182 main features.
Figure 5 shows the block diagram of TAS5182
The TAS5182 is a TI high-power stereo digital audio amplifier driver. Power amplifier power 150W (RMS) can make the wave distortion + noise (THD + N) less than 0.1%.
*Main features are: H-Bridge driver; High power output: 150W 4Ω load RMS state, total harmonic distortion + noise (THD+N) less than 0.1%; 100W 6Ω load RMS state, total harmonic distortion Ten noise (THD+N) less than 0.1%; 90W 8Ω load RMS state, total harmonic distortion + noise (THD+N) less than 0.2%; total power range 20-20kHz total harmonic distortion ten noise (THD+N) Less than 0.10%; with error report self-protection setting (including low voltage, over temperature, short circuit protection); excellent audio characteristics when used in connection with the TAS5518 110dB signal-to-noise ratio (SNR) and total harmonic distortion + noise (THD+ N) is 0?% (typical); supports sample rates from 32kHz to 192kHz; low EMI design is achieved through the necessary regulation; no pop and Cick
* Applications: AV receivers, DVD receivers, active low-frequency loudspeakers, miniature/portable components, and automotive digital amplifiers.
In addition, in many applications, multi-channel audio is introduced into smaller and smaller systems, which requires low-power and low-cost analog ICs that can operate with high efficiency. Even high-volume consumer audio systems require state-of-the-art audio converters to guarantee the high performance and precision required for digital processors to achieve maximum performance.
3.3 The new arrival of "digital" cellular handsets pushes the demand for new analog capabilities indefinitely
With the upgrade of cellular infrastructure from 2G and 2.5G to higher-performance 2.75G and 3G services, the development of a new generation of smarter and more feature-rich mobile phones is being promoted. The rapid convergence of voice, video, and data allows adding exciting features such as MP3 or MP4 music and broadcast TV to the next generation of mobile phones. The cellular handset market has moved in various directions because manufacturers will divide their product lines to meet the needs and habits of different users.
However, the functions of these "digital" cellular handsets are also driving the need for new analog functions, that is, the trend of high-resolution camera integration into wireless handsets, which requires increased performance and image stability of analog image processing. , focusing and telescoping controls and data converters and amplifiers necessary to support these functions.
In addition, the new mobile phone with an easy-to-read color display and a more user-friendly interface requires an advanced liquid crystal display (LCD) backlight power device (see Figure 6). And because designers integrate new voice, video, and data capabilities into these platforms and manage up to 20 different voltage regulators, advanced power management and battery-charging ICs are also needed to ensure that camera performance does not improve. Will shorten the battery life.
3.31 bias power supply for LCD and OLED displays TPS65120 Typical application.
Figure 6 shows a typical application of the TPS65120
The four-output power supply TPS65120, which is used to simplify the structure of TFT displays, is one of the bias power supplies for LCD and OLED displays.
3.311 Its main features
* Main output voltage parameters VMAIN: Adjustable voltage, 3.0V to 5.6V/25mA; post regulation to reduce ripple (5mVpp); ±0.8% typical positive phase output, VGH; up to 20V/2mA Voltage regulation; ±3% typical precision negative output, VGL minimum to -18V/2mA voltage regulation; ±3% typical accuracy.
*Complementary 1.8V/3.3V linear adjustment.
* Automatic or programmable power supply sequence.
*2.5V to 5.5V input voltage range.
* Output short circuit protection.
* Package Mode: 16-Pin QFN Package (3 & TImes; 3 & TI; 0.9mm)
3.312 Application Range
It can be used in the fields of cellular phones, smart phones, PDAs, mini PCs, portable DVDs, digital still cameras (DSCs), and digital video cameras.
These requirements, coupled with the challenges associated with implementing the advanced multi-band, multi-mode radio frequency (RF) and analog interface functions required by the basic communications engine in 3G handsets, will make the average analog IC cost in wireless handsets shortly The future will rise from about 8 dollars today to more than 15 dollars.
3.4 The application of medical image processing is especially outstanding, and the application in magnetic resonance imaging (MRI) is one of the typical
In the healthcare field, the availability of a large number of digital technologies and the shift from fixed systems to portable devices are driving the need for new high-performance analog ICs. For example, in medical image processing applications, high-speed digital calculations allow doctors to view high-resolution CT scan images and ultrasound equipment images in order to more quickly and accurately assess the condition of vital organs or blood vessels. But in order to use these new features cleverly, it is necessary to enhance the signal acquisition capabilities of their products by increasing the channel density and improving the AFE (Analog Front End) performance.
Recent developments in programmable variable-gain amplifiers and analog-to-digital converters (ADCs, see Figure 7(a)) have increased dynamic range and improved image quality. Also, quadrature (I/Q) demodulators and Phaser ICs improve the performance of Doppler ultrasound systems. In addition, by integrating multiple functions and multiple channels into a single chip, these high-performance analog ICs help design engineers build smaller, more portable systems because the size and power of the products are significantly reduced. Consumption.
3.41 4-bit 125MSPS ADCADS5500 Key Features and Applications in Magnetic Resonance Imaging (MRI)
* Figure 7(a) is a 4-bit 125MSPS ADCADS5500 functional block diagram
The ADS5500 provides a complete converter solution. It includes high-bandwidth linear sample and hold stages and internal references. The ADS5500 is designed for applications that require extremely high speed and dynamic performance in a very small space, with 780mW of low power consumption and a single 3.3V supply voltage. The device provides an internal reference and parallel CMOS-compatible outputs ensure seamless connection to common logic circuitry.
* The application of ADS5500 and high-speed current feedback amplifiers in magnetic resonance imaging (MRI) is shown in Figure 7(b).
The ADS5500 can be used in the design of medical MRI equipment. Its 14-bit resolution provides a higher SNR, which allows designers to reduce the magnetic field energy required to achieve high image quality. In addition, the sampling rate of 125 MSPS also creates conditions for oversampling, which also helps improve image quality and simplify filter requirements. In addition, the ADS5500 can also be used in test and measurement instruments, single-channel and multi-channel digital receivers, and video and imaging.
3.5 The use of new analog technology has driven the development of advanced television
Although the emergence of high-definition television and cinema-quality sound is due to the digital revolution, the adoption of new analog technology, like the innovation of digital design, has also promoted the development of advanced television. Even in the era of digital broadcasting, televisions still require two interfaces, namely a digital interface and an analog interface to support traditional video recorders (VCRs), DVD players, and camcorders. Can support a variety of interface standards, from the standard analog interface to the emerging high-definition multimedia interface (HDMl) - highly integrated interface ICs will be applied and meet the needs of the analog or digital input to advanced flat-panel display connectivity.
High-performance audio processors will help shift analog sound processing tasks into the digital realm, and new highly integrated post-processing ICs can improve audio quality by compensating for the limitations of low-profile flat-panel TV designs. Here, a plasma display television audio signal channel (see FIG. 8(a)) is taken as an example for illustration. From the plasma display TV audio signal channel in Figure 8(a), the high-efficiency Class D audio power amplifier solves two problems with flat-panel display audio at higher power: heat consumption and power consumption. Low heat dissipation eliminates the need for large heat sinks. Low power consumption effectively reduces the size and cost of AC/DC power supplies. As such, these advantages also make the flat panel display as thin and light as possible.
*20W Stereo Class D Audio Amplifier TPA3100D2 Key Features
Figure 8 (b) is the application of TPA3100D2
The TPA3100D2 is a high-efficiency Class D audio power amplifier designed to drive bridged stereo speakers. The TPA3100D2 can drive stereo speakers as low as 4Q. When playing music, the TPA3100D2's high efficiency (92%) eliminates the need for an external heat sink. Its main features are: efficient D-type operation; wide 10V to 26V operating supply voltage; 4 integrated gain settings; with thermal protection and short circuit protection and error reporting.
Applications: In addition to Plasma TV (PDP) applications, it can also be used in CRT, Digital Light Source Processing (DLPTV) and LCD TV (LCDTV) applications.
4 ConclusionFrom the above analysis, simulation technology is the data conversion technology and front-end signal processing technology required to control and manage various physical phenomena (such as images, light, sound, motion, pressure, and temperature) in the real world. It is valuable for creating a kind of The new digital terminal (equipment) is a very important and indispensable factor. Therefore, the design and development of analog, digital, and mixed-signal technologies are key to meeting the mass market cost structure that can make digital designs popular by increasing integration, reducing package size, power consumption, and system cost. Therefore, designers should choose the right IC to bring the full potential of digital design to real life.
Description of Antenk's Slim D-Sub Connector
D-Sub Connector Slim is a space-saving D-sub Socket Connector with an 8.54mm depth. The slim 8.54mm depth reduces the board mounting area by 33% as compared with standard models. The Slim Profile D-Sub Connectoroffering includes D-sub sockets with nine right-angle DIP terminals and a mounting board thickness of either 1.6 mm or 1.0 mm (from difference in lock pin structure). RoHS compliant, Slim D-Sub Connector offers a 3A rated current, 300VAC rated voltage, and an insertion durability of 100 times within an operating temperature range of -25º to 105ºC.
Features of Antenk's Slim D-Sub Connector
Board mounting area is reduced by 33% (compared with standard models) using a depth of 8.4mm
D-sub sockets with nine right-angle DIP terminals
Mounting board thickness of either 1.6mm or 1.0mm (from difference in lock pin structure)
RoHS Compliant
Applications of Antenk's Slim D-Sub Connector
Factory Automation
Machine Tools
Power SuppliesMedical Tools
Test & Measurement
LSI/FPD Manufacturing Systems
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Industrial Tools
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