Oscillator circuit
AssigneeFreescale Semiconductor, Inc.
InventorsHao Li, Saverio Trotta
Life of this patent
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Abstract
The invention relates to an oscillator circuit comprising: a VCO core having an output terminal for providing an oscillatory output signal thereat and having a supply terminal for receiving a supply voltage from a voltage supply, a subsequent circuit coupled to the VCO core's output terminal and having a supply terminal for receiving a supply voltage from the voltage supply. According to the invention, a decoupling member is arranged between the VCO core's supply terminal and the subsequent circuit's supply terminal for preventing high-frequency signals generated by the subsequent circuit at its supply terminal from entering the VCO core. The decoupling member may comprise a transmission line the length of which is one quarter wavelength associated with a second-harmonic oscillation.
Claims20
An oscillator circuit comprising:
- a VCO core having an output terminal for providing an oscillatory output signal thereat and having a supply terminal for receiving a supply voltage from a voltage supply;
- a subsequent circuit coupled to the VCO core's output terminal and having a supply terminal for receiving a supply voltage from the voltage supply;
- a decoupling member arranged between the VCO core's supply terminal and the subsequent circuit's supply terminal for preventing high-frequency signals generated by the subsequent circuit at its supply terminal from entering the VCO core;
- wherein the decoupling member comprises a transmission line the length of which is substantially one quarter of the wavelength associated with a second harmonic oscillation.
Dependencies are inferred from the claim text.