Precision analog exponentiation circuit and method
US6771111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Mar 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A precision analog exponentiation circuit includes a precision analog exponentiation circuit includes a first transistor coupled to a reference current for generating a voltage at the first transistor, a second transistor coupled to the first transistor for generating an output current, a variable current source coupled to the first transistor and the second transistor for generating a sum of the reference current and the output current in response to a feedback signal, and a feedback amplifier coupled to the first transistor for generating the feedback signal wherein the variable current source maintains the voltage at the first transistor substantially equal to a reference voltage so that the output current is substantially equal to an exponential function of a control voltage coupled to the first transistor and the second transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.