Low noise oscillator having passive impedance network

An apparatus comprising:

• a resonant circuit having a first terminal and a second terminal, the resonant circuit configured to operate at a resonant frequency;
• a sustaining amplifier comprising a first switch configured to drive the first terminal of the resonant circuit in response to an input at a first control terminal of the first switch, and a second switch configured to drive the second terminal of the resonant circuit in response to an input at a second control terminal of the second switch, wherein the first switch and the second switch are of the same conductivity type;
• and
• a passive impedance network comprising a first inductor and a second inductor, the first inductor being separate from the second inductor, the passive impedance network electrically coupled to the first and second terminals of the resonant circuit, wherein the first inductor is configured to pass a first bias to the first control terminal of the first switch and the second inductor is configured to pass a second bias to the second control terminal of the second switch.