TEA5551T AM radio receiver circuit design electronic project

The TEA5551T monolithic integrated radio circuit can be utilized to design an AM radio receiver circuit intended for portable use with headphones. This circuit incorporates all necessary components for a complete AM radio receiver, including a fully integrated AM section and a dual audio frequency (AF) amplifier that operates with low quiescent current. In many cases, inductors L1, L2, and L3 must be constructed, as they are not readily available for purchase. Construction data for these inductors is provided in the accompanying illustration.

The TEA5551T is a versatile IC designed specifically for AM radio applications. It integrates the essential functionalities required for receiving amplitude-modulated signals, making it suitable for compact designs where space and power efficiency are paramount. The circuit can be powered by a single supply voltage, typically ranging from 3V to 12V, which enhances its portability and ease of use in battery-operated devices.

The AM section of the TEA5551T includes a radio frequency (RF) input stage that amplifies incoming signals, followed by a demodulator that extracts the audio information from the modulated carrier wave. The dual AF amplifier then boosts the audio signal to a level suitable for driving headphones or small speakers. This design ensures minimal power consumption while maintaining good audio quality.

The construction of inductors L1, L2, and L3 is a critical aspect of the circuit, as these components are responsible for tuning and filtering the radio signals. The inductors can be constructed using enameled copper wire wound around a ferrite core or air core, depending on the desired inductance values and physical constraints. The inductance values and the number of turns required for each inductor can be calculated based on the operating frequency and the desired selectivity of the receiver.

The circuit layout should ensure that the inductors are placed close to the TEA5551T to minimize parasitic inductance and capacitance, which can degrade performance. Proper grounding and shielding techniques should also be employed to reduce interference from external sources. The overall design should consider component placement for optimal signal integrity and power efficiency, ensuring that the receiver performs reliably in various environments.

In summary, the TEA5551T-based AM radio receiver circuit is an effective solution for portable audio reception, combining integrated functionality with customizable inductor construction to meet specific design requirements.Using TEA5551T monolithic integrated radio circuit can be designed a AM radio receiver circuit which is designed for use as a portable radio receiver with headphones. The TEA5551T radio receiver circuit contains all is needed for a AM radio receiver circuit (a complete AM part and dual AF amplifier with low quiescent current).

Because in most cas e we don`t find to buy inductors you need to build the inductors L1, L2, L3. In the picture bellow you can see the construction data for these three inductors. 🔗 External reference