RFOG optical receiver circuit

Abstract

The invention relates to an RFOG optical receiver circuit, and belongs to the technical field of radio and television RFOG transmission. The system comprises eight paths of input optical signals, eight groups of optical receiver circuits and eight paths of mixers; wherein the eight paths of input optical signals are respectively connected with the eight groups of optical receiver circuits throughsignal lines, the eight groups of optical receiver circuits are respectively connected with the eight paths of mixers through signal lines, and the eight paths of mixers are connected with the radio frequency output port through signal lines, so that a controlled closed-loop circuit is formed. One group of optical receiver circuits comprises a first path of input optical signal, a photoelectric conversion circuit, a radio frequency amplification circuit, a high-speed operational amplifier comparison circuit, a field effect switch circuit and a path of mixer. According to the invention, eight-path mixed output, high-speed switching of eight-path return signals and effective transmission of multiple paths of signals can be realized, the cost performance is high, excellent indexes are ensured, the convergence noise is effectively reduced, and a user can watch CATV programs only by installing one light spot converter.

Description

technical field [0001] The invention relates to an RFOG optical receiver circuit, in particular to a high-frequency transmission system related to the RFOG optical receiver circuit, and belongs to the technical field of radio and television RFOG transmission. Background technique [0002] With the development of the communication industry, the use of network transmission is diversified. RFOG is used to define a PON network architecture, which can transmit voice, video and DOCSIS-based data on optical fibers. Install a small RFOG transmitter in each household to send optical signals, and the optical signals are transmitted back to the front-end server through optical fibers, which requires a multi-channel return signal mixed output optical receiver. However, what is mainly realized in the market at present is to collect once and output once, collect twice and output one, and collect four and output once. The number of devices, power consumption, and price are all big expens...

AI Technical Summary

Problems solved by technology

However, the mixed output optical receiver of the return signal currently on the market is in the working state for a long time, and the convergence noise of four receiving and one output is large; the number of others will increase, resulting in an increase in the service and manufacturing costs of the front-end computer room

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