TDA7000 FM Receiver / TV Tuner / Aircraft Receiver using pic microcontoller




Parts:
1x TDA7000 IC – FM Receiver
1x 3.5 Turns Variable Coil (L1)
1x MV2105 – Varicap Diode
ANT – Telescopic Antenna
or a piece of wire

1x 100K Potentiometer
1x 100K Resistor
1 x 22K Resistor
3
x 100nF Capacitor
1x 22nF Capacitor 
1x 10nF Capacitor
2x 3.3nF Capacitor
1x 2.2nF Capacitor
1x 1nF Capacitor
2x 330pF Capacitor
2x 220pF Capacitor
2x 180pF Capacitor
1x 150pF Capacitor
  Technical Specifications:
Supply Voltage: 2 – 10V
Transmission Frequency: 70 – 120MHz
Power Consumption: 8mA
AF Audio Output: 75mV
TDA7000 FM Receiver TV Tuner  Aircraft ReceiverAbout TDA7000 FM Receiver / TV Tuner

TDA7000 is a great chip because it includes RF input stage, mixer, local oscillator, IF (intermediate frequency) Limiter, IF filter, amplifier, Phase demodulator, Mute detector, Frequency-Locked-Loop system and voltage controlled oscillator (VCO) all in a single chip, so you don’t have to do so much tuning and tweaking as you would normally do in super heterodyne receivers. TDA7000 is also a great choice for folks that don’t have great experience with RF circuits due to the fact that there are few external capacitors & resistors needed, no external IF filters, and only one variable coil and varicap diode.

The IC has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz. The IF selectivity is obtained by active RC filters. The only function which needs alignment is the resonant circuit for the oscillator, thus selecting the reception frequency.

TDA7000 FM Receiver TV Tuner  Aircraft ReceiverSpurious reception is avoided by means of using a muting circuit similar to squelch. This eliminates and rejects other input signals around selected frequency so that even remote stations can sound clear just as if they were located near by.

 

For more detail: TDA7000 FM Receiver / TV Tuner / Aircraft Receiver




Current Project / Post can also be found using:

  • interface for tda7000
  • varicap mv2105 varicap

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