Injection locking oscillator circuit and operating method
AssigneeSamsung Electronics Co., Ltd.
InventorsYOUNG CHOI, WONJOO JUNG, YOUNGCHUL CHO, YOUNGDON CHOI, JUNGHWAN CHOI
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Abstract
An injection locking oscillator (ILO) circuit includes; an injection circuit that receives input signals having a phase difference and provides injection signals respectively corresponding to the input signals based on a voltage level difference between each input signal and an oscillation signal at an output terminal, and a poly-phase signal output circuit that provides poly-phased signals having a phase difference between signals fixed to a defined phase difference upon receiving the injection signals from the input terminals.
Claims20
An injection locking oscillator (ILO) circuit, comprising:
- an injection circuit configured to receive input signals having a phase difference relative between the input signals and provide injection signals respectively corresponding to the input signals based on a voltage level difference between each input signal and an oscillation signal;
- and
- a poly-phase signal output circuit configured to output poly-phase output signals having a defined phase difference between the output signals in response to the injection signals.
A quadrature skew compensation circuit comprising:
- a quadrature oscillator configured to generate oscillation signals having different phases and respectively provide the oscillation signals at nodes, such that each node provides an oscillation signal orthogonal to a different oscillation signal provided at a neighboring node;
- and
- an injection circuit configured to receive input signals respectively corresponding to the nodes and output injection signals to the respective nodes based on a voltage level difference between the oscillation signal of each node and the input signals.
An operating method for an injection locking oscillator (ILO), the operating method comprising:
- injecting an injection signal to a first node based on a voltage level difference between an input signal corresponding to the first node and an oscillation signal generated in the first node;
- synthesizing the oscillation signal with the injection signal in the first node;
- and
- outputting, from the first node, a signal having a fixed quadrature phase difference with respect to neighboring nodes of the first node based on a signal provided by synthesizing the oscillation signal with the injection signal.
Dependencies are inferred from the claim text.