TDA7021T FM integrated radio receiver circuit design

Subscribe by email

Using the TDA7021T integrated radio receiver circuit can be designed a very simple high efficiency portable radio receiver circuit fully compatible for applications using the low-voltage micro tuning system (MTS). The TDA7021T has a frequency locked loop (FLL) system with an intermediate frequency of 76 kHz. The selectivity is obtained by active RC filters. The only function to be tuned is the resonant frequency of the oscillator.
Because of the low intermediate frequency, low pass filtering of the MUX signal is required to avoid noise when receiving stereo. 50 kHz roll-off compensation is needed because of the low pass characteristic of the FLL.
For mono application this amplifier can be used to directly drive an earphone. The field-strength detector enables field-strength dependent channel separation control.
With a combination of a low voltage PLL stereo decoder ( TDA7040T ) and a low voltage mono/stereo power amplifier we can build a simple portable radio .
For this radio receiver circuit we need a 5V dc power supply .

Circuit Diagram: 
TDA7021T FM integrated radio receiver circuit design

Comments

Post new comment

The content of this field is kept private and will not be shown publicly.
CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Enter the characters shown in the image.

Circuit Diagram
TDA7338 FM stereo decoder circuit TDA7338 FM stereo decoder circuit

This compact design FM stereo decoder circuit is designed using the TDA7388 IC manufactured by...

RF amplifier circuit diagram RF amplifier circuit diagram

This RF amplifier circuit is a very simple and is designed to work for 10 meters band (26 ... 30...

LM565 FSK demodulator circuit design LM565 FSK demodulator circuit design schematic

A very simple FSK demodulator for the 2025 Hz and 2225 Hz can be designed using the LM565 which...