Drive device
US8649537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2010 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Jun 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45728
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is provided a drive device capable of driving a capacitive load with efficiency and with low power consumption while keeping quality input reproducibility for output signal. A switching drive circuit 10f repeatedly performs operations in the order of VCP charging phase PH_VCP_CH, VCP discharging phase PH_VCP_dCH, VCN charging phase PH_VCN_CH, and VCN discharging phase PH_VCN_dCH. A switching amplifier 10 allows a charging phase per cycle for an input signal VIN that is a reference for operation to be either a phase in which the slope of the input signal VIN is positive from a reference voltage REFL or greater until a maximum voltage, or a phase in which the slope of the input signal VIN is negative from a reference voltage REFH or less until a minimum voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.