Oscillator with controlled current source for start stop control
US6169462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/0208
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A first inverter is provided with a feedback resistor for biasing the inverter to a linear operating range and an AC feedback path for causing oscillations to occur. A controlled current source, responsive to a control signal Vc supplied thereto and coupled to an input of the inverter supplies a current in a first sense thereto for enabling the oscillations and supplies a current in a second sense thereto for inhibiting the oscillations. The controlled current source comprises a second inverter for amplifying the control signal Vc to a logic level substantially greater than that of the first inverter and a current limiting resistor coupled in series with the second inverter for limiting current flow to and from the input of the first inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.