Gated ring oscillator for a time-to-digital converter with shaped quantization noise
US8138843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2007 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Nov 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K23/54
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Described is a compact, lower power gated ring oscillator time-to-digital converter that achieves first order noise shaping of quantization noise using a digital implementation. The gated ring oscillator time-to-digital converter includes a plurality of delay stages configured to enable propagation of a transitioning signal through the delay stages during an enabled state and configured to inhibit propagation of the transitioning signal through the delay stages during a disabled state. Delay stages are interconnected to allow sustained transitions to propagate through the delay stages during the enabled state and to preserve a state of the gated ring oscillator time-to-digital converter during the disabled state. The state represents a time resolution that is finer than the delay of at least one of the delay stages. A measurement module determines the number of transitions of the delay stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.