Suggested by a 1990 book for amateurs, this circuit makes use of an integrated component that is not common today. It converts signals from one band to signals in a 10.7 MHz band below.
In the figure we have a current source whose intensity is given by the formula next to the...
Twin- T oscillators can be used to produce sinusoidal signals in the audio track with good...
We found this circuit in 2005 Linear Technology documentation. The integrated circuit is LT1787...