This invention relates to oscillators employing a primary feedback network and a high pass filter feedback network. The feedback networks are connected between the input and output of a of a high signal gain amplifier system. The primary feedback network provides positive feedback to cause oscillation...http://www.google.fr/patents/US5459438?utm_source=gb-gplus-shareBrevet US5459438 - Negative feedback frequency stabilized pulse oscillator
Negative feedback frequency stabilized pulse oscillator