Found in American documentation, this circuit for modulated infrared signals can be tuned to a certain frequency. The photodiode can be of any type.
We found this circuit in a Texas Instruments optoelectronics manual. The audio modulator serves for...
This Baxandall tone control circuit is based on the JFET integrated circuit at the CA3140 input. The...
In the figure we have an amplifier step configuration with a transistor suggested by a 1985...