With the surge in the incidence of serious diseases such as diabetes and heart disease, there is a growing demand for accurate portable home patient monitoring systems, including cholesterol, blood conditions, blood pressure monitoring, and other portable medical devices. Moreover, it is more important that the user of the device can follow up on the results of the individual test. Technological advances in the mobile phone industry have created fairly uniform standards and form factors that have greatly improved the usability and ease of use of products. For patient monitoring equipment, there are many situations that need to be considered to simplify this phase. This article will take advantage of the success of integrated circuits (ICs) in the mobile phone industry, enumerate these considerations, and more importantly, introduce the latest IC devices that can help with this simplification process.
Depending on how mobile phones evolve, there are a number of clear trends that all portable devices should consider. The following topics will be discussed: I/O standards, the advantages of USB ports, the durability of ESD protection, and the use of analog switches to improve the functionality of FPGAs and ASICs in medical devices.
As ASICs and FPGAs become more popular, using them as the core of the device seems to be a natural decision. The initial cost advantage of this decision can be easily calculated, but it is important to consider the various components needed to integrate into an all-in-one device. The core operating voltage of a portable design is often 2.5V or less, which is very useful when working away from the battery, and a boost power management device can be used to maintain efficiency with minimal voltage difference. However, the ability to implement such low core voltages and rich gate counts in ASICs is not without its drawbacks. Instead, these devices are susceptible to high voltage peaks (even with small current values). These peaks are called electrostatic discharges. (ESD).
If the specifications are listed in the data sheet, the ASIC's ESD rating is approximately 2kV HBM (human body model). This is not a problem for internal interfaces in portable medical devices, but ESD can cause any silicon device connected to an external connector to fail.
For such situations, analog switches are an ideal choice. Connector interfaces, from video to data I/O ports to audio headsets, are suitable for analog switches. Fairchild is a leader in the switching market. These switches can easily support 8kV HBM protection, even exceeding 10kV; bandwidths from a few kilohertz to the latest video switch series exceed 1GHz. They not only protect the ASIC, but they also add functionality to packages close to the chip level. Their functional terminology is the term for standard switches, ie SPST corresponds to a single pole single throw switch; SPDT is a double throw. The number of switches in a single package can be 1~4, supporting single-ended and differential interfaces. Adding analog switches can bring a variety of ASICs. For example, if there are two separate sensors in a medical device (such as two blood analysis sensors in a diabetes detector, one as a backup; the other as an accurate measurement), an SPDT switch can be used in the ASIC and each Switch between sensors. The headphone port can be used with a dedicated switch to switch between the two sound generators or to provide undershoot protection to avoid a slight popping sound when the headphones are plugged into the jack.
An important feature of all portable devices is the ability to add storage. There are many standards for memory cards, and the most common standards are SD, MicroSD, and XD. To avoid limiting the design to a memory card, you can add more than two memory card slots using an analog switch. Since only one memory card can be accessed at a time, there is no need to use a dynamic hub type switch. The SD card evolved to be able to integrate applications into the actual memory card. Applications include "Bluetooth", Wi-Fi, fingerprint scanners and GPS, and this development continues. Adding SD card functionality to portable designs will benefit as these cards evolve.
As mentioned earlier, analog switches can also be used if a variety of video sources need to be mixed. This is not a common requirement for portable medical devices, but video output connectors have become more common on all other types of portable devices. Mobile phones have begun to add such features, mainly for viewing photos taken with a camera. So why set up a video output port on the medical device?
Because the composite video output allows the user to review all the records in their entirety, or to play back the video in full size. Graphics processing is often an option offered by ASIC vendors, but a drive cable for the video driver is also required. Fairchild's newest FMS6501 is an ultra-small, integrated video filter and line driver that provides ESD protection.
Regardless of the presence or absence of a video port, such a device must have a method of inputting and outputting external data. It is even more desirable if this port is also the main port for battery charging. The Universal Serial Bus (USB) standard for widely used I/O ports does just that, and it has almost replaced the previous serial connection. As USB technology matures, USB will have more options. USB OTG (On The Go) Connect your medical device directly to the printer without using a PC to establish a communication connection. In addition, wireless USB brings more convenience. In this case, the main decision is whether to integrate the USB transceiver with the ASIC or a separate PHY-level transceiver. The advantages of using a discrete transceiver approach are similar to those described above using analog switches. They eliminate the ASIC's pins for complex I/O and provide ESD buffering for expensive core devices. Fairchild's USB transceivers offer 15kV ESD protection, the highest in the industry. The USB port in the PC can also be used to provide 5V power at 500mA through the Vbus pin. The power supply can be used to power the device in a synchronized manner and can even be used to charge the battery. Please refer to the USB standard to ensure compatibility with the power supply specification. It may be necessary to set a current limiting device on the port at the same time, such as Fairchild's Intellimax(r) device.
Medical consumer products are designed to be easy to use, durable and precise. The potential of portable technology has emerged and is being proven in today's mobile phone industry, hoping to maintain as few portable devices as possible. The medical community must follow a similar path of development, such as integrated blood analyzers, thermometers, and blood pressure devices. When the medical device is combined with the PC's analytical capabilities via a USB port, the patient is able to perform accurate tests and track the entire process. Understanding these leading-edge ICs in the small-signal field will enable the development of better end- medical products .
Food additives refer to chemically synthesized or natural substances added to food in order to improve the quality, color, aroma and taste of food, as well as for the needs of antiseptic and processing technology. Due to the rapid development of the food industry, food additives have become an important part of the modern food industry, and have become an important driving force for technological progress and technological innovation in the food industry. In the use of food additives, in addition to ensuring that they play their due functions and roles, the most important thing is to ensure the safety and hygiene of food.
Our company provides chemical food additives, natural food additives, etc.
Food Additives,Beverage Additives,Malic Acid Powder,Natural Food Additives
XI AN RHINE BIOLOGICAL TECHNOLOGY CO.,LTD , https://www.rhinebioteches.com