VOLTAGE CONTROLLED OSCILLATOR WITH MULTI-BAND FREQUENCY MATCHING CIRCUITS

摘要

PURPOSE: A voltage controlled oscillator with multi-band frequency matching circuits is provided to generate one form of radio frequency from bands of more than two frequencies. CONSTITUTION: A voltage controlled oscillator with multi-band frequency matching circuits includes the following components. A resonance circuit(30), a variable frequency band unit(40), a buffer amplifier(70), and a multi-band frequency matching unit(100). A resonance circuit(30) is equipped with a Line Concentrator(LC) parallel circuit of capacity(C1) and inductor(L1) and a serial circuit of capacity(C2) and varactor diode(VA). A varactor diode(VA) functions as a variable capacity as it forms LC parallel resonance circuit by the authenticated voltage of the voltage source(Vt). The LC parallel resonance circuit(30) generates signals according to the size of the voltage from the voltage source(Vt).