Circuit and method for measuring current in a circuit
US5543706A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1994 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Jun 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/16595
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic circuit for measuring current in a working circuit is provided with a first operational amplifier having a positive input, a negative input, and an output connected to at least one in-line amplifier to form a first current path. A second operational amplifier having a positive input, a negative input, and an output connected to a differential amplifier is provided within the circuit to form a second current path. An input terminal is connected to the negative inputs of each of the operational amplifiers to provide a connection between the electronic circuit and the working circuit. A variable conductance component is connected in series between the input terminal and the negative input of the second operational amplifier to control the flow of variable currents through the two current paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.