The circuit presented is from the Motorola Linear Databook of 1990. The integrated circuit is a transconductance operating and the power supply need not be symmetrical.
We found this portable transmitter that reaches up to 200 meters in a Japanese publication from...
This power supply is indicated for the supply of not very powerful car radios of the AM and FM...
This project was found in a 1982 publication. It is a small transmitter that can send signals from...