Infrared receiver (also known as the infrared receiver module, IRM) is an integrated infrared receiver diode PD, amplifies, filters, and the comparator output, the IC module. We are no longer making receiver amplifier circuit, so infrared receiver simplifying the circuit.
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Before understand infrared receiver, we first look at what is “infrared.” Infrared fact infrared short, is a spectrum (electromagnetic waves) in between 0.75 to 1000 microns you and I can not see the light. From the above understanding, we can launch, infrared receiver receives the infrared is a kind of thing used to. This thing is there are many names, usually called infrared receiver, referred to as receiver, can also be called an infrared receiver, infrared receiver, infrared receiver module, remote control receiver can also be more complex, that is, after adding a line in the infrared words, such as infrared receiver, then you can learn by analogy, make persistent efforts of the. In addition to Chinese name, English name as well as an infrared receiver, called Infrared? Receiver? Module, called IRM, with international practice.
Then, follow us Chao Yi Electronics engineers to see infrared receiver look like, according to the appearance can be divided into two categories: the nose type, ball type (dot type). The nose can be subdivided into large type in the nose, standard nose, small nose. In addition there are other special, such as ultra-thin, mini, straw hat, patch type, with line receiver.
Apart from the appearance of classification, but also can be classified according to package, this is more accurate. Currently on the market can buy the receiver from the package divided mainly into two categories: pressure model and filling plastic type. In general, nose type are filling plastic type, ball type belongs pressure models. From the two packaging technology, investing large pressure model equipment, the use of plastic bread more expensive, so the overall price to be more expensive, of course, its resistance to light interference stronger, larger acceptance angle (360 degrees round the reception); irrigation glue-type device small investment now made mostly domestic plants glue products, the advantage is cheap, the disadvantage is poor resistance to light interference, the receiver angle is smaller (270 receiving). Of course, there is a false pressure model, the use of plastic irrigation methods to make ball-type, similar to the shape of the die way to do it, but it certainly did not die of a good performance.
Sometimes, the outside receiver also wear an iron vest, so they can receive the head is divided into two kinds of plastic and steel, the benefits are much more than steel outer layer shield against light and the ability to have a certain power interference shielding role, relatively speaking reception performance to stable. Of course, if the product design OK, under the same distance of two pieces of plastic with a reception to be a little further away. Of course, with or without steel prices will have some differences, so the choice to receive or not to take the first concrete steel according to the design to be. With the use of plastic toys products, with the home appliance products in the steel belts are more general.
Most are now available in the market is the integration of remote control receiver, this remote control receiver to receiver module, PIN photodiode and preamplifier IC, integrated in a component, to realize the infrared remote control signal pickup, amplification reconciliation tone, the detector output signal can be decoded directly by the microprocessor.
Infrared receiver is widely used in: air conditioning, fans, heaters, humidifiers, TV, DVD, set-top boxes, car mobile DVD, hard disk player, multimedia hi-fi, digital photo frames, mobile phones, home appliances, computers and peripheral equipment, sanitary sensors , instrumentation, industrial automation, remote control toys, communication equipment, photographic equipment, business machines, financial electronics, automotive electronics, lighting and other fields.
