Mobility compensation in MOS integrated circuits
US6822505B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1999 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Dec 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45542
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transconductance-setting circuit (10, 20) and method. The circuit (10, 20) includes a first transconductor (14) coupled to a reference voltage (Vref) adapted to produce a current output (Ibias). A reference current source (Iref) is coupled to the first, transconductor (14), and a feedback loop (16) is coupled to the first transconductor (14) and the reference current source (Iref). The feedback loop (16) is adapted to reduce error in the current output (2i) and set the transconductance gm of the first transconductor (14) to a value proportional to the ratio of the reference current and the reference voltage. An auxiliary transconductor (22) is coupleable to the first transconductor (14), and control circuitry (30, 40) is adapted to control the coupling of the auxiliary transconductor (22) to the first transconductor (14) based on the current output (2i). The method includes the steps of applying a reference voltage (Vret) to the first transconductor (14), comparing the current output (2i) from the first transconductor (14) to the reference current Iref, and setting the difference between the first transconductor (14) output current (2i) equal to the reference current Iref with th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.