Enhancing device reliability for voltage controlled oscillator (VCO) buffers under high voltage swing conditions
US8242854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2010 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Aug 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for a voltage controlled oscillator (VCO) buffer is described. The circuit includes a first capacitor connected to an input of the VCO buffer that is connected to a VCO core. The circuit also includes a second capacitor connected to the input of the VCO buffer and the gate of a p-type metal-oxide-semiconductor field effect (PMOS) transistor. The circuit further includes a first switch connected to the first capacitor and the gate of the PMOS transistor. The circuit also includes a third capacitor connected to the input of the VCO buffer. The circuit further includes a fourth capacitor connected to the input of the VCO buffer and the gate of an n-type metal-oxide-semiconductor field effect (NMOS) transistor. The circuit also includes a second switch connected to the third capacitor and the gate of the NMOS transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.