Voltage controlled oscillator utilizing threshold voltage control of silicon on insulator MOSFETS
US6133799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled ring oscillator (VCRO) that can operate at low voltage and provide a variable periodic output. A plurality of transistors form a ring oscillator and a selected transistor in the ring oscillator has a body which can float with respect to ground potential. The selected transistor has a threshold voltage which is controllable by a voltage applied to the transistor body. A control input is coupled to the transistor body such that the body of the transistor can be charged by the control input. Charging the body alters the threshold voltage of the transistor and thereby controls the oscillation frequency of the oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.