A TRF (tuned radio frequency) receiver circuit was constructed and studied. It consists of a modulating signal, impedance matching transformer, and speaker. Voltage measurements were taken at different points in the circuit with a DC voltage ranging from 0 to 9.67 volts and an AC voltage ranging from 0.03 to 4.31 volts depending on the point. The circuit was also simulated.

2. Md. Sohel Rana

3. EXPERIMENT NO: 05
NAME OF THE EXPERIMENT:
To Construct a TRF receiver and study its operation.

4. Contents :
Definition of TRF Receiver.
Block diagram of a TRF receiver.
Experimental Circuit .
Procedure for the experiment.
Experimental Data.

5. What is TRF receiver ?
The TRF receiver is a electric circuit
which separates the radio signal
from modulated wave

7. Experimental Circuit :

8. Modulating Signal
SpeakerImpedance Matching Transformer

9. Experimental Data:
Table-1: Data for Voltage and Wave shape of different point in the
circuit.
𝑉𝑐𝑐 = +10𝑉
No. of
Obs.
Point location in the circuit DC Voltage
(Volt)
AC Voltage
(P-P)
(Volt)
Wave Shape
1 A 0 0.03
2 B 0.3 0.035
3 C 8.50 0.20
4 D 9.67 4.31

10. Circuit simulation of TRF :