Optical receiving apparatus
US5612810A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Sep 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/695
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical receiving apparatus of the present invention comprises an opto-electric conversion element for converting an optical signal into an electric signal, a differential type preamplifier for sending a non-inverting phase signal and a inverting phase signal of the electric signal and a first and second peak hold circuits for holding peak values of the respective non-inverting and inverting phase signals. Further, the optical receiving apparatus of the present invention comprises a first adder for adding the inverting phase signal to the non-inverting phase peak signal from the first peak hold circuit and a second adder for adding the non-inverting phase signal to the inverting phase peak signal from the second peak hold circuit. Further, the optical receiving apparatus comprises a main amplifier including a differential amplifier having inputs supplied with outputs of the first and second adders and a comparator for outputting a binary signal correspondingly to a high and low levels of two output signals of the differential amplifier. The peak values of the non-inverting and inverting phase signals of the receiving signal are held and added by a feedforward connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.