Active filter circuit for regulated DC to DC power supplies
US4160288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | May 17, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A regulated DC to DC power supply which minimizes input bus current changes caused by low frequency cyclical load variations is disclosed. The power supply includes a regulator connected to the input bus and controlled by a pulse width modulator. The regulator converts the DC voltage on the input bus to a higher, regulated DC voltage which is supplied to a variable load. A voltage feedback circuit is connected to the output of the boost converter and generates a control voltage which is supplied to the pulse width modulator to regulate the output voltage for variations in line voltage and load. The voltage feedback circuit includes an operational amplifier having a reference voltage supplied to a positive input terminal, and the output of the regulator supplied to a negative input terminal. A frequency response shaping network is connected between the output and the negative input terminal of the operational amplifier. An input bus current-sensing servo circuit is connected to sense current variations in the input bus and generate a control signal to the pulse width modulator to regulate the input current of the regulator. The input bus current-sensing servo circuit also includes a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.