Trimming procedure and code reuse for highly precise DC-DC converters
US12267084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2022 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Aug 11, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/785
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A converter system includes a reference buffer buffering a reference input to produce a DAC reference, operating from a reference feedback voltage generated by a reference divider. A tail buffer generates a tail voltage from an input voltage generated from the DAC reference by a tail divider. An R-2R type DAC utilizes an R-2R ladder to generate a DAC output from a code. This ladder has a tail resistor coupled to the tail voltage. A feedback buffer buffers the DAC output to produce a converter reference. A DC-DC converter generates a DC output from a DC input, based upon a converter feedback voltage. A feedback divider coupled between the DC output and the converter reference generates the converter feedback voltage. Control circuitry selectively taps the reference divider to produce the reference feedback voltage (performing gain trimming) and selectively taps the tail divider to produce the input voltage (performing offset trimming).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.