Nth Order function converter
US4507577A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1981 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Feb 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An analog circuit for implementing nonlinear operators such as an Nth-root extractor or an Nth-power operator. Two input currents yield one output current having the relationship I.sub.1 =I.sub.k.sup.-n I.sub.2.sup.n+2, where n is a positive integer and I.sub.k is a gain setting current. When n=1 the circuit functions as a square root extractor or a squaring converter. The present circuit is readily implemented with bipolar technology and offers high speed performance and temperature stability without external compensation. Typical applications of the present circuit include RMS measurement, auto-correlation, power measurement and gain compression/expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.