Found in Philips' 90s documentation, this small source can use modern transistors like the BD135 for TR4 and the BC series for the rest.
This circuit was found in an Electronics Now of the 90s. It is intended for amplifying composite...
We found this circuit in an American 80's documentation. The resistors must be of high precision...
MXT1665T-A Family from Microchip Brings the User Experience of Multi-Touch HMI into the VehicleCHANDLER,...