High voltage generating circuit able to generate positive high voltage and negative high voltage at the same time
US5831844A · kind A · utility
11Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plurality of diode-connected MOS transistors are arranged in cascade connection, and clocks are supplied to nodes between the MOS transistors. A node (N40) is connected to a first voltage source line (VCC) via a first switch (SW1), a node (N46) is connected to a second voltage source (GND) via a second switch (SW2), an intermediate node (N43) is connected to a third voltage source (VCC) via a third switch (SW3). The third switch is turned ON and the first and second switches are turned OFF to output the positive high voltage (VPP) from the node (N46) and also to output the negative high voltage (VBB) from the node (N40).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.