Sine-shaping circuit
US4395642A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1980 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Dec 11, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B28/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for converting a triangular waveform into a sinusoidal waveform using the non-linear transfer characteristic of a first transistor differential amplifier. Second and third differential amplifiers are parallel-connected to said first differential amplifier with the slopes of their transfer characteristics in opposite sense thereto and having their operating points shifted on their transfer characteristics in opposite directions with regard to each other and symmetrically to the operation point of said first differential amplifier so that the resulting overall transfer characteristic of said first, second and third differential amplifiers has zero slope at the extremal amplitudes of said triangular waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.