公开(公告)号：US4146850A

公开(公告)日：1979-03-27

申请号：US884390

申请日：1978-03-08

申请人： Michel Fache ,  Claude Juliot

发明人： Michel Fache ,  Claude Juliot

IPC分类号： H03B1/00 ,  H03B5/12

CPC分类号： H03B5/1231 ,  H03B5/1203 ,  H03B5/1243 ,  H03B5/1293 ,  H03B2200/004 ,  H03B2200/0086 ,  H03B2201/0208

摘要： In a tunable UHF transistor oscillator with a frequency determining resonating LC circuit reduction of the harmonic to fundamental ratio is obtained through the use of an output circuit consisting of an output resistor connected in parallel with a resistor voltage divider a part of which is used as a damping resistor for a second controllable tuned circuit comprising an inductor with a larger inductance than that of the frequency determining circuit and the same capacitance and a non linear circuit between the control voltage source and the adjustable capacitor of said second circuit. The output is taken across the second tuned circuit. Coupling between the transistor and the frequency determining circuit is low.