Saturday, February 6, 2010

Done Mature In Calore

FM receiver of 1.5 MHz to 110MHz with TDA7000

This circuit is known is the TDA7000 and huge amounts of applications. This is being proposed is the most common as an FM receiver that goes from 1.5 MHz to 110MHz band-run. The integrated
detail can be seen in its datasheet.
The circuit itself was developed to capture the satellite NOAA13 (meteorological satellite), of course they are saying but emits NOAA13 frequency of 137.5 MHz and this receiver only supports up to 110MHz, well the reality is that I had to make a prescaler by an RF FET amplifier, but then I propose this circuit so far only covers the TDA7000 so also pretty funny because one of the uses to which it is as commercial FM radio receiver and the TDA allows us, but if we go down a little often as we hear about 50MHz channel 2, and good in between there are other transmissions that go there.
As if a circuit to experiment, and that just vary the amount of turns in the coil, we more or less local oscillator frequency.
NOTE: The circuit must be assembled on board, since it tends to breadboard Whimper and could fail.
below shows the application circuit.
Resize the PCB.