LDO/HDO architecture using supplementary current source to improve effective system bandwidth
US9122292B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2013 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An LDO/HDO circuit adds a supplementary current source to supply the output node. The current boosting section includes a digital comparator with a first input connected to the LDO's feedback loop and a second input connected to a reference level. The comparator then generates a digital output used to control the supplementary current source. This approach also can be used in a far-side implementation, where the local supply level for the load is boosted by the current source based a comparison of this local level and the output of the LDO. Miller capacitive compensation is also considered. Current in shunted to ground from a node in the Miller loop, where the level is controlled by the output of a digital comparator base on a comparison of the circuit's output voltage and a reference level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.