Companding current-mode transconductor-C integrator
US5189321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Sep 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/184
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a current-mode transconductor-C integrator, the non-linearity of the voltage-to-current conversion of a transconductor is corrected by means of a differentiator which supplies a current (i.sub.d) which is proportional to the derivative of a current (i.sub.f) which in turn is proportional to the transconductor output current (i.sub.out), with respect to the transconductor control (v). An input current (i.sub.in) is divided by the current (i.sub.d) by means of a current divider. The resultant quotient current (i.sub.q) is applied to an integrating capacitor across which a voltage (v) is built up. This voltage is converted into the output current (i.sub.out) by the transconductor. This results in an output current (i.sub.out) which is linearly proportional to the integral of the input current (i.sub.in) without the distortion usually caused by the non-linear voltage-to-current characteristic of the transconductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.