Patent ID: 8957740
Filing Date: 2015-02-17
Classification: H03B,H03L

Abstract:
1. An oscillator circuit, comprising: a resonator; a pair of amplifier cores coupled in series, each of the amplifier cores comprising at least a first transistor device and a second transistor device; a load capacitance coupled in parallel to the resonator, the load capacitance divided into a plurality of sub-capacitances, each of the sub-capacitances associated with a transistor device of the pair of amplifier cores, each sub-capacitance coupled between two nodes of the associated transistor device; and at least one of a first feedback loop coupled from a drain of a first transistor device of a first amplifier core to a gate of a second transistor device of the first amplifier core and a second feedback loop coupled from a drain of a first transistor device of a second amplifier core to a gate of a second transistor device of the second amplifier core, the first feedback loop and/or the second feedback loop configured to increase a negative resistance of the oscillator circuit.