DC-to-DC switching power supply utilizing a delta-sigma converter in a closed loop controller
US5677618A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-to-DC switching power supply (12) receives a DC biased power signal at a first input (14), a control signal at its control input (16) and produces an output DC voltage at its output terminal (20). A power supply controller (30) compares the produced output signal V.sub.out with an input reference signal V.sub.ref. The reference signal is an analog signal which may be produced via digital-to-analog converter (34) which converts a digital input command into a corresponding analog signal V.sub.ref. The resulting error signal is then passed through a proportional gain block 36 and an integral gain block (38). A signal proportional to the differential of the output voltage is passed through a differential gain block (44). The outputs from the proportional gain block (36) integrator gain block (38) differential gain block (44) are summed in the second summer (40) and applied as the input to a delta-sigma converter (42). The output from delta-sigma (42) then constitutes a fixed-width pulse stream of predetermined sequence such that, when applied to the control input (16) of the switching power supply (12), the power supply produces a DC output signal V.sub.out at its output terminal …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.