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because I would like digital tuning...look at the philipps OM5604, 5606 5610 modules. they are no more sold only by brockers for around $40. you can also buy some pci fm radio cards for $20 and extract the OM56xx module from it they often have this module on it... you get fm, stereo and even rds data on it..
TDA7088T has auto tune feature(like digital tunning)
The radio which used 7088T is about 1usd
Equipped with all stages of a mono receiver from
antenna to audio output
· Mute circuit
· Search tuning with a single varicap diode
· Mechanical tuning with integrating AFC
· AM application supported
· Power supply polarity protection
· Power supply voltage down to 1.8
The TDA7088T is a bipolar integrated circuit for use in
mono portable and pocket radios. It is used when a
minimum of peripheral components (of small dimensions
and low costs) is important. The circuit contains a
frequency-locked-loop (FLL) system with an Intermediate
Frequency (IF) of about 70 kHz. Selectivity is achieved by
active RC-filters. De-tuning related to the IF and too weak
input signals is suppress
Here is the Data Sheet of TDA7000 for narrowband FM Reception
/Deleted. Warning #2 - Search google before uploading. It is available here:
1.) TEA5757 and TEA57.. except TEA5711 and TEA5712 works till 3V only for battery applications its not enought.
2.) TDA7088 need stereo decoder.
3.) Case... i need atleast SSOP or something smaller than it.
I send what you can't see, the schematic of a stereo receiver with tda7088 and the comment :
It also contains the so-called auxiliary signal which allows the separation of left (L) and right (R) channels in the stereophonic receiver. E.g. if a direct broadcast of some band music is performed, the left part of performers is being recorded with one microphone (the signal marked as L), whilst the right side is recorded with the other one (it’s a R signal). These two signals are being led in the FM transmitter in the stage called “the coder”. Exiting the coder we have the multiplexed signal Mpx which contains, in an indirect manner, both left (L) and right (R) signal. Frequency modulation of the transmitter is being performed with the Mpx signal. In the receiver, Mpx signal is obtained on the output of the FM Detector and is then led to the decoder. This stage plays a role complementary to the one of the coder in the transmitter, therefore two signals are exiting it, the L and D signal. They are being amplified over two identical audio amplifiers, then reproduced over two same loudspeakers. The listener can now hear the left half of the performers from the loudspeaker placed on its left, and the right half from the loudspeaker that is placed on its right. The performers that are situated in the middle of the orchestra are being equally reproduced from both loudspeakers, making an impression to the listener as if there’s a third loudspeaker, located in the middle, between the left and right one. Based on all this, the listener has a picture about the layout of the performers in space, which significantly improves the total musical impression.
Electronic circuit of a portable stereophonic radio receiver with headphones reproduction, made with TDA7088T is shown on pic.4.19.* L3, L4 and L5 are HF chokes that allow for the headphones cable to be used as a reception antenna. This is accomplished by connecting one of the headphones’ contacts from the plug-in, over the 10 pF capacitor, to the point where, acc. to pic.4.14, the outside antenna is connected. The coils represent big resistance to the station signals, preventing them to “go to ground” over the 47 mF capacitor or over the TDA7050T output. Each coil has 3 quirks of the 0.2 mm CuL wire, threaded through ferrite pearls, as shown on detail in the right corner of the pic.4.19.
today I received an "old" isa radio fm card which I bought for 1 euro on ebay...plus 6 euros for freight charges !!
this card has a tea5712, a lm7000 (sanyo pll circuit) a volume control, a small amplifier, and you can interface it easyly with a microcontroler everything is explained here : https://www.hw.cz/constrc/radiokarta/radiokarta.html
if someone can translate .cz to english pleaaaase ??