Current control semiconductor device and control device using the same
US9154033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Aug 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A current control semiconductor device that can detect a current with high precision within an IC of one chip by dynamically correcting a variation in a gain a and an offset b, and a control device using the semiconductor device are provided. A transistor 4, a current-voltage converter circuit 22, and an AD converter 23 are disposed on an identical semiconductor chip. Reference current generator circuits 6 and 6′ superimpose a current pulse Ic on a current of a load 2, and vary a voltage digital value output by the AD converter. A gain/offset correction unit 8 subjects a variation in a voltage digital value caused by the reference current generator circuits 6, 6′ to signal processing, and dynamically acquires gains a, a′ and offsets b, b′ in a linear relational expression of the voltage digital value output by the AD converter 23 and a current digital value of the load. A current digital value calculation unit 12 corrects a voltage value output by the AD converter with the use of the gain and the offset acquired by the gain/offset correction unit 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.