Synthesizer circuit for generating three-tier waveforms
US4135235A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1977 |
| Grant date | Jan 16, 1979 |
| Priority date | — |
| Expiry date | Oct 31, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/483
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC to AC converter capable of producing up to three-tier waveforms includes a first transistorized switching amplifier operable to a first condition, for charging a first capacitor to +2E volts, concurrent with applying +E volts to a first terminal, and connecting a DC supply of -E volts to the positive plate of, and in series circuit with, a second capacitor (previously charged to have a voltage drop thereacross of -2E volts), the series circuit being connected between a reference and second terminals, for applying -3E volts to the second terminal. The first switching amplifier is operable to a second condition for charging the second capacitor to -2E volts, concurrent with applying -E volts to the second terminal, and applying +E volts to the negative plate of the first capacitor, the positive plate of which is connected to the first terminal, for applying +3E volts to the first terminal. A second transistorized switching amplifier is operable to a first or second condition, for individually connecting the first and second terminals to an output terminal, respectively. A control circuit is used to operate the first and second switching amplifiers in various combinations of thei…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.