Voltage controlled oscillator
US8519799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Nov 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled oscillator including a control signal adjuster and ring-connected delay cells is disclosed. The control signal adjuster receives a first control signal to generate a second control signal boosted from the first control signal when the first control signal is lower than a transistor threshold voltage. The ring-connected delay cells are controlled by the first and second control signals both to generate an oscillation signal. Each of the delay cells has a first set of current generation transistors and a second set of current generation transistors. Each transistor of the first set of current generation transistors has a control terminal receiving the first control signal while each transistor of the second set of current generation transistors has a control terminal receiving the second control signal. The first and second sets of current generation transistors collectively output an oscillation signal with unchanged frequency of associated input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.