Really, though, any oscillator that can be made stable will work. In fact, I have two old Heathkit dippers that use a negative resistance tunnel diode as an oscillator (one of them is in the ...

Negative resistance, however, causes current and voltage to be 180 ... The oscillations are sustained by repetitive reexcitation. Unres- onant oscillator circuits use no tuning. They depend on the ...

A second method considers the oscillator as a one- port with a negative real impedance to which a resonator is attached. The loop method provides a more complete and intuitive analysis while the ...