This circuit was obtained from an American 1980s documentation. The frequency depends on the crystal and the circuit may be a PNP that reaches the generated frequency.
This configuration can be implemented with equivalent operations. The circuit is from the 1990...
This circuit was found in an American documentation from the 90's. The operational amplifier is the...
Current sensors of the type High-Side (high side) are circuits that monitor the current drained by a...