Methods and apparatus for calibrating gm-Z
US7218179B2 · kind B2 · utility
2Cited by
8References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Aug 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one embodiment of the present invention, an apparatus includes a plurality of gain stages each having a gain greater than one, and which are coupled to create a positive feedback at an oscillation frequency. The gain stages may be formed of transconductance gain stages which may be coupled together as a ring oscillator or a latch type circuit. Such circuits may be used as calibration circuits in which small signal parameters of the gain stages are directly calibrated, and are used in turn to directly calibrate small signal parameters of a target circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.