Unlock instant, AI-driven research and patent intelligence for your innovation.

Long glow detection circuit

A detection circuit and long-light emitting technology, which is applied in the direction of transmission monitoring/testing/fault measurement systems, etc., can solve problems such as prone to malfunction and unable to adjust timeout time

Active Publication Date: 2016-06-01
PHICOMM (SHANGHAI) CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a long luminous detection circuit that uses a digital sequential circuit to judge long luminous

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Long glow detection circuit
  • Long glow detection circuit
  • Long glow detection circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The long luminescence detection circuit of this embodiment is composed of two D flip-flops from Texas Instruments, a delayer, an AND gate and a clock unit, wherein in the D flip-flop of this embodiment input and The input terminals are respectively the R input terminal and the S input terminal in the definition of the D flip-flop in the art.

[0054] so if figure 2 shown, the D flip-flop U1’s The input terminal is connected to the light-emitting state signal TX_SD of the ONU, the CLK input terminal of the D flip-flop U1 is connected to the clock signal CLOCK, and the D input terminal of the D flip-flop U1 and The input terminals are all connected to a high-level signal VCC.

[0055] The CLK input terminal of the D flip-flop U2 is also connected to the clock signal CLOCK, the Q output terminal of the D flip-flop U1 is connected to the input terminal IN of the delayer U4, and the output of the delayer U4 The terminal OUT is connected to the D input terminal of th...

Embodiment 2

[0068] Such as Figure 4 As shown, the difference between the long light emission detection circuit of this embodiment and the long light emission detection circuit of embodiment 1 is:

[0069] In this embodiment, the D input terminal of the D flip-flop U1 is connected to a low level, that is, the ground GND, and the input terminal of the D flip-flop U1 is connected to a high-level signal VCC. The light emitting state signal TX_SD is connected to the input terminal.

[0070] Since the level connected to the D input terminal of the D flip-flop U1 is changed, the timing signal U1Q output by the Q output terminal of the D flip-flop U1 in the present embodiment and the Q output terminal of the D flip-flop U2 output The level of the timing signal U2Q is inverse to the levels of the timing signal U1Q and the timing signal U2Q in Embodiment 1.

[0071] The specific working principle of the long-light emission detection circuit in this embodiment is the same as that in Embodiment 1,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a long-time light-emitting detection circuit which is used for detecting the long-time light-emitting state of an ONU according to a light-emitting state signal of the ONU. The long-time light-emitting detection circuit starts to collect the light-emitting state signal on each rising edge or each falling edge of a clock signal, the collected light-emitting state signal serves as a long-time light-emitting signal. Within the time range from each rising edge or each falling edge to the next rising edge or the next falling edge relative to each rising edge or each falling edge in the clock signal, when the level of the light-emitting state signal jumps, the level, existing when the level of the light-emitting state signal jumps, of the light-emitting state signal is used by the long-time light-emitting detection circuit for filling the long-time light-emitting signal within the time range from the moment when the level of the light-emitting state signal jumps to the next rising edge or the next falling edge of the clock signal. The digital sequence circuit mode is used for judging long-time light-emitting by the long-time light-emitting detection circuit. The long-time light-emitting detection circuit further avoids generation of wrong logics in a sequence circuit through and operation and the like.

Description

technical field [0001] The invention relates to a long luminescence detection circuit, in particular to a long luminescence detection circuit used for an ONU (optical node). Background technique [0002] Like all PON (passive optical network) systems, GPON (gigabit passive optical network) consists of ONU, OLT (optical line terminal) and passive optical distribution network. The OLT provides an interface between the network side and the core network for the access network, and is connected to each ONU. As the core functional equipment of the PON system, the OLT has the functions of centralized bandwidth allocation, control of each ONU, real-time monitoring and operation, maintenance and management of the PON system. The ONU provides the user-side interface for the access network, provides voice, data, video and other multi-service flows and ODN (Optical Distribution Node) access, and is centrally controlled by the OLT. The branch ratio supported by the system is generally ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/07
Inventor 赵春和文君吴继新
Owner PHICOMM (SHANGHAI) CO LTD