Hybrid multiplying capacitive digital-to-analog converter (MC-DAC) based loop regulation
US10848171B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2020 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Jan 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/802
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and associated methods relate to providing a regulation loop using a digital representation of a loop error signal along with a flexible multiplying capacitive digital-to-analog converter (MC-DAC) circuit to control one or more power switches (e.g., transistors) delivering required power (including voltage and/or current) to a load circuit. In an illustrative example, the MC-DAC circuit may include a digital-to-analog converter (DAC) configured to selectively couple to two different reference voltages in response to switch control signals generated by a digital filter. A capacitive level shifter may be coupled to the output of the DAC. A re-sampling circuit may be coupled to the output of the capacitive level shifter to generate a gate control signal to control the one or more power switches. The regulation loop may advantageously generate the gate control signal using a substantially reduced die area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.