Method and apparatus for a regulated supply on an integrated circuit
US5563779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Dec 5, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A regulated supply (10) includes a charge pump (12), an output (14), a sensing circuit (16), and a control circuit (18). The charge pump (12) includes a variable capacitor (33) whose capacitance C.sub.v may be varied to compensate for changing loads and input power supply levels. The sensing circuit (16) senses the voltage level at the output (14) and provides feedback signals (66) and (68) to the control circuit (18). The voltage at the output (14) is dependent upon the capacitance C.sub.v of the variable capacitor (33). Therefore, responsive to the feedback signals (66) and (68) from the sensing circuit, the control circuit (18) varies the capacitance C.sub.v of the variable capacitor (33). The control circuit (18) then may vary the value of C.sub.v in a step-like manner to correct for the voltage at the output (14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.