Low-power current mirror having feedback with optical isolation
US5283441A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/085
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An optically isolated current mirror provides an isolated output signal as a function of an input signal. The mirror includes first and second optical isolators and an amplifier. The amplifier is connected to the first and second optical isolators in a voltage follower configuration which supplies the output signal as a function of an isolated control signal and an isolated feedback signal. The first optical isolator is connected between a source of the input signal and the amplifier. The first optical isolator includes a photosensitive np junction which generates the isolated control signal as a function of the input signal. The second optical isolator is connected to the amplifier in a feedback loop. The second optical isolator includes a photosensitive np junction which generates the isolated feedback signal as a function of the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.