Driving circuit for capacitive load and liquid injecting apparatus
US7852128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2009 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Mar 8, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/0459
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A driving circuit for a capacitive load includes a driving signal generating unit that generates a driving signal for driving the capacitive load by using a pair of driving transistors. A power source voltage generating unit generates high-voltage and low-voltage power source voltages that are higher and lower, respectively, than the voltage of the driving signal and applies the voltages to collectors of the driving transistors. The power source voltage generating unit includes a pair of power source transistors and a capacitor. The low-voltage power source voltage is generated in an output side of the power-source transistor pair as a voltage that is in a voltage region lower than that of the driving signal and follows the driving signal. The high-voltage power source voltage is output from a high-voltage terminal of the capacitor, is in a voltage region higher than that of the driving signal, and follows the driving signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.