Found in American documentation from the 90's, this circuit oscillates up to 150 MHz. The transistor supports an equivalent and the diode is general-purpose.
This circuit is from an old European documentation, already influencing the unijunction oscillator that...
Being able to function as a shield, this amplifier was found in documentation from the 70s....
This circuit is suggested by the Texas Instruments Linear Circuits Applications, based on the FET...