Driving circuit for capacitive load and fluid injecting device
US7880515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2009 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/14274
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A driving circuit that drives a capacitive load includes a drive signal generator that generates a drive signal driving the capacitive load via a transistor pair in response to an analog signal, and a power-source voltage generator that generates a high-voltage power-source voltage and a low-voltage power-source voltage and that supplies the high-voltage power-source voltage and the low-voltage power-source voltage respectively to collectors of the transistors of the transistor pair via a high-voltage output terminal and a low-voltage output terminal. The power-source voltage generator includes multiple power sources connected in parallel, a backcurrent prevention diode connected between the adjacent power sources, and a switch unit that connects the adjacent power sources in series under the on-off control of a controller each time the drive signal rises above a predetermined threshold value or falls below a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.