BRU from EPCOS AG. Find the PDF Datasheet, Specifications and Distributor Information. epcos r datasheet, cross reference, circuit and application notes in pdf format. R ,92 MHz. Abstract: R epcos r SM r SAW R SAW R sm r R EPCOS r saw S M R Text: Competitor P/N (MHz).

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Principles of SAW resonator stabilized oscillators and transmitters No related posts.

Use hot air or reflow techniques if you can, or else heat the epcks plane from the side, OR remove the resonator by applying a small amount of solder to the case top and heat it up completely. I would guess that is pretty much the same for each car manufacturer, as are the inner workings.

RF Components and Modules

It can be seen as an extreme example of amplitude modulation AMand wpcos principle is identical to the way TV remotes work — only that RF ecpos used instead of IR light. Whatever you choose should use the same frequency, of course, and run on batteries. Imagine unlocking your car, driving around some, and then being unable to lock it again. If the range is much less, the transistor is most likely not up to the job.

How it works, in easy words: There is a lot more theory behind this, you can look it up in dedicated books about high frequency circuits and transmitter circuits.

Reproduction, publication and dissemination of this data sheet, enclosures hereto and the information contained therein without EPCOS ‘ prior express consent is prohibited. This picture was taken after the repair, which explains the flux residues. EPCOS is worldwide market leader in low-voltage power factor correction. The output to the antenna the copper strip along the left edge appeared near-zero and the pulse signal after the coupling resistor was pretty deformed, too.


EPCOS is continually improving its processes and thus theconstantly reviewing and systematically improving its quality management system. They are a real pain in the ass to solder by hand!

Your email address will not be published. I had to try two different transistors, the first one was probably already dead before transplantation I already wondered why I never used that remote control. I did it like this twice, but as said — pain!

epcos r datasheet & applicatoin notes – Datasheet Archive

This is called OOK, or on-off-keying. EPCOS is continually improving its processes and thus the quality of itsand systematically improving its quality management system. But, to be fair, they were not really designed for it. EPCOS is continually improving its processescommitted to constantly reviewing and systematically improving its quality management system.

Epcos r707

Repairing a remote car key August 16, Those resonators cost you a few cents at Farnell, but I would guess Digikey also has them. This will be the one nearest e;cos feeding point of the antenna, like in the picture above. What you can measure, though, is the pulse signal from the controller. This signal is fed into the resonator through a resistor and a capacitor, and from the resonator back through said capacitor to the base of the output transistor.

In the end, you probably have to find out by trial and error. The probability of finding a suitable transistor inside such a transmitting device is very high. A second one worked like a charm! But it made me wonder if it could be fixed — so I cracked it open.

It features a standard circuit that very closely resembles my remote key, plus a detailed function explanation. Imagine repeatedly hitting a tuning fork with a small hammer and touching it to stop the vibration in a certain pattern while picking up the generated sound with a microphone to amplify it.


All was well until another key broke down — same procedure, different day. Do not heat the resonator for too long. Try Findchips PRO for epcos r You will need to reassign the key to your vehicle according to the proper method designated by the manufacturer.

Leave a Reply Cancel reply Your email address will not be published. To solder on the new one, place it onto the cleaned pads and flow solder underneath the pins from the side, for each pin individually. No abstract text available Text: EPCOS has design, manufacturing and marketing facilities in Europe, Asia and thesupport in the early phases of their projects.

Now, to get a suitable replacement, you can either buy a transistor that works for frequencies up to above the operating frequency of your device and has the same pinout — or you can simply go look for a cheap remote controllable wall socket, wireless weather station or the likes.

Epcos r – Montare motore elettrico

I swapped it anyways — even swapped the old one back once I found the error — to make sure, but the real culprit was the HF output transistor which I have marked in the lower left. The resistor limits the output impedance of the controller pin to prevent it from clamping the transistor base to a fixed voltage and allow the resonator to overlay an AC component onto the DC voltage. Inside the metallic-ceramic casing is a parallel LC resonance circuit which has been precisely trimmed for a specific resonant frequency.

B 0A95 B Text: EPCOS has design, manufacturing and marketingand manufacturing know-how and support in the early phases of their projects.