Categories: Radio

FM Receiver with TDA7021T

This is the circuit diagram of mini FM receiver that build based on single FM IC TDA7012T.

Components List:

R1 = 8k?2
R2 = 10k?
R3 = 390?
C1,C3 = 10nF
C2,C6,C9,C16 = 100nF
C4 = 33pF
C5 = 25pF trimmer (Murata type TZB4Z250AB10R00)
C7,C10 = 1nF5
C8 = 820pF
C11 = 1nF
C12 = 68pF
C13 = 220pF
C14 = 47uF 10V (Nichicon UWX1A470MCL1GB 5.5mmL chip type)
C15 = 3nF3
L1 = 36nH (4 turns 0.5mm silver-plated wire, inside diameter 4mm; length 7mm)
L2 = 1uH, SMD case 0805 (fres > 300 MHz)
IC1 = TDA7021T (SMD in SO16 case)


The TDA7021T integrated radio receiver circuit is for portable radios, stereo as well as mono, where a minimum of periphery is important in terms of small dimensions and low cost. It is fully compatible for applications using the low-voltage micro tuning system (MTS). The IC 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. Interstation noise as well as noise from receiving weak signals is reduced by a correlation mute system.

PCB Layout:

This receiver is a mono implementation, but at the output, the entire multiplexed signal (up to 53 kHz) is available. By using a PLL stereo decoder, such as the TDA7040T, a stereo signal can be generated in a traightforward way from the output signal of the TDA7021T.

Download the TDA7021T datasheet include the schematic diagram how to make this circuit stereo.
[wpdm_file id=55]

FM Receiver with TDA7021T source: http://electroniccircuit-s.blogspot.com/2009/07/mini-fm-receiver-circuit.html

circuit schematic

View Comments

Share
Published by
circuit schematic

Recent Posts

Switched ON Bike Lamp

Do you have a bicycle..? why don't try to build this circuit..?. Powered using battery…

54 years ago

3A Switching Power Supply Regulator

This is the circuit diagram of 3A switching power supply regulator: Simple and cheap, the…

54 years ago

Remote Control Tester

Here is the remote control tester circuit. This circuit is really a simple and easy…

54 years ago

Current Output Multiplier for 78xx Regulator

This is the circuit diagram of current output multiplier designed for regulator IC LM78xx. By…

54 years ago

4 Transistor FM Tracking Transmitter

The following diagram is the FM tracking transmitter based on 4 transistors. No additional notes…

54 years ago

White Line Follower

This is the circuit diagram of white line follower toy. The actuator of the toy…

54 years ago