Title:
OPTICAL RECEIVER HAVING AN OPEN LOOP AUTOMATIC GAIN CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO2004109938
Kind Code:
A3
Abstract:
The present invention is directed towards an optical receiver including an open loop automatic gain control (AGC) circuit (405). Optical signals received by the optical receiver are converted to electrical signals via a photodiode (205). The electrical signals are subsequently amplified through an input (310) and an output (315) amplifier stage. The amplified signal is then converted to RF signals and provided to an output port for further transmission (RF output). Concurrently, the AGC circuit senses the input optical power level at the input photodiode. The input optical power level is compared with a reference voltage (Ref V), thereby providing a difference voltage. The difference voltage (Vc) is applied to input and output amplifier stages for correcting the electrical signals to ensure a constant output power level.
Inventors:
KAMALI WALID (US)
SKROBKO JOHN (US)
SKROBKO JOHN (US)
Application Number:
PCT/US2004/017980
Publication Date:
April 13, 2006
Filing Date:
June 07, 2004
Export Citation:
Assignee:
SCIENTIFIC ATLANTA (US)
KAMALI WALID (US)
SKROBKO JOHN (US)
KAMALI WALID (US)
SKROBKO JOHN (US)
International Classes:
H04B10/158; H04B10/43; (IPC1-7): H04B10/06; H03G3/20
Foreign References:
| US20030090320A1 | 2003-05-15 | |||
| US4975604A | 1990-12-04 |
Other References:
See also references of EP 1649603A4
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