Reference voltage generator for logic elements providing stable and predefined gate propagation time
US7609119B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Nov 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reference voltage generator and a method for generating a reference voltage for a logic device using the reference voltage generator is provided. The voltage reference generator includes a ring oscillator having a plurality of logic gates and a phase/frequency detector. A first reference voltage is generated on the basis of a phase/frequency difference between the phase/frequency of a reference clock and the phase/frequency of the ring oscillator. A second reference voltage is generated on the basis of a voltage swing of the oscillator circuit. Both reference voltages can be applied to the plurality of logic gates of the ring oscillator such that a constant delay is created through each logic gate of the logic device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.