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|OCI Page: RF Transmitter|
|Input: 9V, single ended signal|
|Output: Antenna Output|
This is a design from the Open Circuit Institute. More can be found HERE.
A simple Radio Frequency Transmitter. The circuit includes a DC rejection capacitor, input low pas filter, and a resonant circuit for AM modulation. A tunable capacitor is used in order to generate a resonating carrier.
The design could be built on significantly - perhaps by adding an antenna trace rather than outgoing terminals. Add buffering circuits. Perhaps add input and output amplifiers. Add a simple mixer for an external modulator. The possibilities for extension are endless.
This design is made with reference to a design in Practical Electronics for Inventors, Third Edition
Design Files & Videos
Available at the Open Circuit Institute: http://opencircuitinstitute.org/content/rf-transmitter