Patent ID: 7852161
Filing Date: 2010-12-14
Classification: H03K

Abstract:
1. An oscillator comprising: a first ring oscillator, the first ring oscillator including a first plurality of inverters; a first plurality of capacitors, wherein a first terminal of each of the first plurality of capacitors is coupled to an output terminal of a corresponding one of the first plurality of inverters; a second ring oscillator, the second ring oscillator including a second plurality of inverters; and a second plurality of capacitors, wherein a first terminal of each of the second plurality of capacitors is coupled to an output terminal of a corresponding one of the second plurality of inverters; wherein a second terminal of each of the first plurality of capacitors is coupled to an output terminal of a corresponding one of the second plurality of inverters; wherein a second terminal of each of the second plurality of capacitors is coupled to an output terminal of a corresponding one of the first plurality of inverters; and wherein the oscillator is configured to provide as an output a differential clock signal.