Gyrator with loop amplifiers connected to inductive elements
US6194972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Feb 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A gyrator includes shunt or feedback nodal capacitors and shunt lossy inductors without shunt load resistors. The effective nodal capacitance is reduced by the introduction of the shunt lossy inductors. The inductors act to discriminate against injected power supply noise, resulting in improved oscillator phase noise. The inductors produce less dc voltage drop than the resistive load, so that larger linear oscillation is obtained with improved oscillator phase noise. The gyrator includes an automatic gain control circuit and a tuning control circuit which are separate from each other and fast and slow acting control loops which are augmented with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.