Digital programmable direct current to direct current (DC-DC) voltage-down converter
US6181123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital programmable DC--DC voltage-down converter which can be used in a low voltage and low power digital circuit design is disclosed. The DC--DC voltage-down converter includes at least a digitally controlled oscillator (DCO), a pulse-width modulator (PWM), a gate driver, and a switching-type voltage-down converter. Duty cycle and operating frequency of the modulated signal are controlled by using two digital control signals. Furthermore, combining the pulse-width modulator and the digitally controlled oscillator (DCO), the duty cycle of the generated clock is more robustly stable for different frequencies during process variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.