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DIY Hobby projects, diagram, schematic

Electronic Circuits

DIY Hobby projects, diagram, schematic

TDA7000 FM Radio Receiver Circuit

electronicecircuits, January 1, 2010August 18, 2023
tda7000 fm radio or receiver with lm386 amplifier

TDA7000 FM Radio Receiver Circuit Using Tuning Capacitor


GENERAL DESCRIPTION The TDA7000 is a monolithic integrated circuit for mono FM portable radios or receivers where a minimum on peripheral components is important (small dimensions and low costs).
The IC has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz. The i.f. 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. Spurious reception is avoided by means of a mute circuit, which also eliminates too noisy input signals. Special precautions are taken to meet the radiation requirements.

The TDA7000 includes the following functions:
· R.F. input stage
· Mixer
· Local oscillator
· I.F. amplifier/limiter
· Phase demodulator
· Mute detector
· Mute switch

tda7000 fm radio receiver  circuit using Tuning Capacitor

This circuit is typical using with a  LM386 for the audio power amplifier.

With a minimum on peripheral components we can build a high performance and small FM radio receiver .

PARTS LIST
C10.22µF (224)
C222nF (223)
C310nF (103)
C427pF
C522pF
C63.3nF (332)
C7180pF (181)
C8330pF (331)
C93.3nF (332)
C10150pF (151)
C1182pF
C1268pF
C13220pF (221)
C14100nF (104)
C15330pF (331)
C16220pF (221)
C171.5nF (152)
C18470nF (474)
C19100nF (104)
VC1FM Tuning Capacitor (15-30pF)
R110kΩ
R222kΩ
R310kΩ
L15¾ (5.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter. (≈78nH)
L24¾ (4.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter. (≈70nH)
IC1TDA7000
ANTTelescopic antenna or 1m wire
S1Mute Switch (mute is disabled when switch is on.)

TDA7000 FM Receiver Coils

tda7000 fm radio Tuning coil L1tda7000 fm radio antenna coil L2
L1:Tuning Coil, 5¾ (5.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter.L2: Antenna Coil, 4¾ (4.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter.

TDA7000 IC

TDA7000 FM Radio OR FM Receiver IC
TDA7000 QUICK REFERENCE DATA
Supply voltage range (pin 5)VP2.7 to 10 V
Supply current at VP = 4.5 VIPtyp. 8 mA
R.F. input frequency rangefrf1.5 to 110 MHz
Sensitivity for -3 dB limiting
(e.m.f. voltage)
(source impedance: 75 Ω; mute disabled)
EMFtyp. 1.5 mV
Signal handling (e.m.f. voltage)
(source impedance: 75 Ω)
EMFtyp. 200 mV
A.F. output voltage at RL = 22 kΩVotyp. 75 mV
tda7000 Block diagram fm radio receiver

TDA7000 FM Radio Using Tuning Capacitor

tda7000 fm radio Receiver


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Comments (15)

  1. Taylor Dyke says:
    March 25, 2010 at 3:46 am

    Hello there, i am attempting this circuit, and i have a few questions.

    1) How do you determine the values of VC1, L1 and L2 if you wish to cover other parts of the FM band, for example 27mhz instead of the 87-108 mhz band (i presume this schematic is for the typical FM radio band)

    2) have you placed any errors purposely to stop reproduction of this circuit??

    I will only be making one of these circuits as im trying to experiment with electronics and i hope you reply sonn

    regards, Taylor

    Reply
  2. seetharaman says:
    May 1, 2010 at 2:38 pm

    Hi Dyke you can use this IC between 1.5 to 110MHz FM range. refer the following doc,
    http://www.pira.cz/pdf/TDA7000.pdf
    use suitable tuned circuits.

    Reply
  3. Taiye says:
    April 22, 2011 at 10:51 am

    Can sombody mail me on i can d calculations d fm receiver 4 project sake

    Reply
  4. Manuel says:
    August 19, 2011 at 4:25 pm

    I’m about to make this circuit, but I have one question
    can I use a normal capacitor with a range between 15 and 30 pF as explained above as tuning capacitor? so without using the one you put in this circuit.

    Reply
  5. NeedInfo says:
    February 15, 2012 at 5:52 am

    what are the materials of the capacitors?

    Reply
  6. Grace says:
    March 6, 2012 at 8:55 pm

    how can we receive signals? we can’t even have one.
    and is that fine we took out the mute switch?

    Reply
  7. rezasat says:
    May 15, 2012 at 1:03 pm

    hello

    Reply
  8. gede7 says:
    June 28, 2012 at 8:37 pm

    Will this circuit work on 9 V battery?

    Reply
  9. Edson says:
    November 7, 2012 at 7:17 pm

    Does this circuit really works ? Can I tune with it
    the aircraft band (118 – 136 MHz ) ?
    Thanks.

    Reply
  10. f de mahy says:
    January 27, 2013 at 1:48 am

    HELLO I M TRYING TO MAKE THE TDA RECEIVER IN THE 75 MHZ RANGE .IT SEEMS THE PROBLEM I HAVE IS THE AUDIO IS FEEDING BACK INTO THE OSCILLATOR .I VE TRIED DECOUPLING THE LINES WITHOUT ANY SUCCESS.ANY IDEAS
    THANKS.
    FdeMahy

    Reply
  11. gica70 says:
    April 15, 2013 at 10:59 pm

    Edson :
    Does this circuit really works ? Can I tune with it
    the aircraft band (118 – 136 MHz ) ?
    Thanks.

    NO!. Airband is AM not FM.

    Reply
  12. Sahan says:
    July 23, 2013 at 8:02 pm

    the circuit works fine!

    Reply
  13. algeria says:
    November 24, 2013 at 9:14 pm

    i turned tda 7088t into vhf radio up to 150 mhz by only adjusting the osc coil up to 9 turns . and removing the 18p capacicitor in parrallel with vc .make antenna more than 1m vertical .

    Reply
  14. GINO VERATELLI says:
    September 12, 2014 at 3:20 pm

    l’autoradio VOXON TANGA FM montava l’integrato TDA7000 ?

    Reply
  15. Dave says:
    July 17, 2015 at 12:36 am

    First of all:
    Forget the aircraft band, that is AM and this chip is for FM so listening to aircraft’s on AM is out the question.

    The chip will work on 27Mhz FM but the selectivity will be wider because CB on 27Mhz is 5Khz wide…. meaning you might be hearing more than on station at once.

    The chip will work merrily on 9V but I would not go anything higher…. 6V is about the norm I would say.

    At VHF earthing is very important it is preferable the circuit is built on a PCB rather than vero board.

    The mute switch is only a feature and may be left in circuit or out of circuit OR the mute enabled or disabled – up to the user.

    The I.F frequency is 75KhZ so the oscillator would need to be tuned 75KhZ above the wanted frequency (or frequency range).

    There is no exact calculation to determine L and C for other frequencies, this may be had from radio handbooks or coil data sheets such as Toko or Spectrum coils….. experiment is usually required here without test equipment.

    Good quality can be got from this chip but don’t expect good selectivity performance compared to a proper FM receiver with their 10.7Mhz IF frequencies, the IF frequency in this chip is only 75Khz!!!!!

    Thought I’d try and clarify one or two points.

    Reply

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