Fluidic die with monitoring circuit fault protection structure
US11667128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2018 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Apr 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6871
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A fluidic die includes fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a high voltage. The fluidic die further includes monitoring circuitry, operating at a low voltage relative to the fluid actuator, to monitor a condition of each fluid chamber, for each chamber the monitoring circuitry including a connection structure and a select transistor and a pulldown transistor connected to the electrode via the connection structure. The connection structure and select and pulldown transistors together structured to form electrically conductive paths with electrical resistances to protect at least the select transistor from fault damage if the high voltage fluid actuator short-circuits to the electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.