FM transmitter Circuit with 4 Transistors

FM transmitter Circuit with 4 Transistors

FM transmitter Circuit with 4 Transistors

This circuit delivers an FM modulated signal having an output power of about 500mW. The input microphone pre-amplifier is designed close to a pair of 2N3904 transistors (Q1/Q2), and audio gain is restricted by the 5k preset trimmer potensiometer (trimpot).

Some substitutes for the 2N3904 are: NTE123AP, 2N4401, BC547 (watch lead orientation), and so on

FM transmitter Circuit with 4 Transistors was last modified: January 19th, 2015 by circuit diagram
This schematic diagram come from circuit: 4 Transistors FM Transmitter.
Go to that page to read the explanation about above circuit design.

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In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.

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