TDA7000 Fm radio receiver electronic schematic

The Fm receiver from the circuit presented in this schematic is based on the TDA7000 chip which is a monolithic integrated circuit for mono FM portable radios .

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

The TDA7000 FM radio chip  has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz and the selectivity is obtained by active RC filters. The only function which needs “calibration”  is the resonant circuit for the oscillator (for the reception frequency ).

Main features of the TDA7000 are : R.F. input stage , Mixer , Local oscillator ,I.F. amplifier/limiter ,Phase demodulator , Mute detector ,Mute switch .

Using an integrated device like Tda7000 in your FM radio has been can eliminate LC tuned circuits from the RF, IF, local oscillator and demodulator stages. A way to eliminate the coils in the IF and demodulator stages is to reduce the normally used intermediate frequency of 10.7MHz to a frequency that can be tuned by active RC filters.

TDA7000 can also be used as receiver in equipment such as cordless telephones, CB radios, radio-controlled models, paging

systems etc.

The TDA7000 radio circuit needs a 4.5 volts power supply .

For AF amplifier you can use the circuit below or an integrated amplifier like TDA7052 amplifier , Tda1011 or others .