Tunable oscillator having series and parallel tuned resonant circuits

Abstract From the Canadian patent

There is described a voltage controlled oscillator having an active device having first and second terminals a biasing , circuit coupled to the first terminal a tuning network coupled , to the second terminal first resonator circuitry coupled to the second terminal in series with the tuning network the first , resonator circuitry having a first resonant frequency second , resonator circuitry coupled to the second terminal in parallel with the tuning network, the second resonator circuitry having a second resonant frequency different than the first resonant frequency, a second tuning network coupled between the first resonator circuitry and the second resonator circuitry the , second …