Amplifier improvements for limiting clipping
US4048573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Oct 15, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/301
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential amplifier is connected to an amplifier for comparing an amplifier input signal with the signal fed back by the amplifier feedback circuit. The output of the differential amplifier is coupled to a full wave rectifier the output of which controls an attenuator connected between a source of electrical input signals and the amplifier. When the amplifier is operating in its linear range, the differential amplifier inputs are identical and it does not produce an output. Under this condition, the input signal is not attenuated. However, in the presence of amplifier clipping, the differential amplifier produces an output which, after full wave rectification, operates to increase the attenuation, and thus reduce the amplitude of the signal applied to the amplifier; clipping is limited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.