Current source with variable resistor circuit
US10345841B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Jun 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/38
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A current source circuit includes a first variable resistor circuit. The first variable resistor circuit includes a resistive material and a first plurality of tap inputs configured to set a resistance of the first variable resistor circuit. The current source circuit includes an output configured to provide a current. The current is adjustable by varying the resistance of the first variable resistor circuit. The current source circuit includes a second variable resistor circuit. The second variable resistor circuit includes a resistive material of a same resistive material type as the resistive material of the first variable resistor circuit. The second variable resistor circuit includes a second plurality of tap inputs configured to set a resistance of the second variable resistor circuit. Each tap resistance of the second variable resistor circuit is proportional to a corresponding tap resistance of the first variable resistor circuit. A first terminal of the second variable resistor circuit is coupled to a first test port and a second terminal of the second variable resistor circuit is coupled to a second test port to allow for a resistance measurement of the second variable re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.