An apparatus utilizing the basic oscillation characteristics of the Colpitts or Pierce and Hartley oscillator configurations. In this embodiment the basic shunt reactive shunt arms are replaced with a selected pair of tank circuits or one of the shunt arms with a series-parallel tank circuit....http://www.google.fr/patents/US4378532?utm_source=gb-gplus-shareBrevet US4378532 - Oscillator mode suppression apparatus having bandpass effect
Oscillator mode suppression apparatus having bandpass effect
