Dual-mode logarithmic amplifier having cascaded stages
US5414313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Feb 10, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dual-mode successive detection amplifier for providing a first output signal corresponding to a logarithmic function of a RF input signal, and for providing a second limited RF output signal is disclosed herein. A RF input signal is applied to the first of a succession of amplification stages arranged along a RF signal path to cascade amplify the RF input signal into the limited RF output signal. A plurality of detector/limiter (D/L) circuits interposed between the amplification stages limit RF signal energy propagating along the RF signal path so as to prevent saturation of the amplification stages. The D/L modules also provide a succession of detection signals corresponding to video envelopes of the RF signal energy produced by each of the amplification stages. The detection signals are applied to a video summation line and therein summed to produce the logarithmic output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.