This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms output. Input impedance is 1 M ohm.
Found on an 80's Elektor, this circuit uses common components, being the diode a general purpose...
This 1.6 GHz oscillator with 40 mW of output power was found in a Popular Electronics from...
Found in a 90’s Popular Electronics, this circuit uses two CMOS inverters to generate a signal of...