A loss of signal detection circuit
A technology for detecting circuit and signal loss, which is applied to logic circuits with logic functions, electrical components, electromagnetic wave transmission systems, etc. The effect of improving the speed and improving the detection accuracy
Active Publication Date: 2022-08-05
HUAIYIN TEACHERS COLLEGE +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The traditional LOS detection circuit detects the input signal at a low rate, and is affected by the process, power supply voltage and temperature, and its accuracy cannot be guaranteed, which may cause the system to work abnormally under different environmental conditions
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0069] The technical solution will be further described below with reference to the accompanying drawings and specific embodiments.
[0070] like figure 1 Shown is the overall structural block diagram of the signal loss detection circuit of the present invention. The signal loss detection circuit includes an input buffer circuit, an AC coupling module, two peak detection circuits, a comparator circuit, two 5bit current DACs and a digital arithmetic unit. The output of the differential input buffer circuit is connected to the input of the differential AC coupling module, the output of the AC coupling module is connected to the high-speed signal peak detection circuit, the output of the high-speed signal peak detection circuit is connected to the negative terminal of the comparator, and the output of the mirror peak detection circuit is connected to the comparison the positive end of the device. The digital arithmetic unit controls two 5bit current DACs, and controls the workin...
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
Login to View More Abstract
A signal loss detection circuit, which relates to the technical field of integrated circuits, mainly consists of an input buffer circuit, an AC coupling circuit, a high-speed signal peak detection circuit, an image peak detection circuit, a comparator circuit, and two sets of current digital-to-analog conversion circuits. And a digital algorithm control logic composition. The high-speed signal peak detection circuit detects the amplitude of the input signal and generates a voltage proportional to the amplitude of the input signal. The mirror peak detection circuit generates a reference voltage that can vary with PVT (process, power supply voltage, temperature). The two voltages are compared to obtain the signal loss detection result. Two sets of current digital-to-analog conversion circuits and an algorithm control logic are used to compensate the offsets of the two peak detection circuits and the comparator, which can further improve the detection accuracy. The present invention effectively reduces the influence of PVT and misalignment on the detection precision, and improves the detection precision of signal loss.
Description
technical field [0001] The invention is a signal loss detection circuit used for the receiving end in optical fiber communication and other systems, which can detect whether the receiving system has sufficient swing signal input, and the circuit has the characteristics of simple design and high precision. Background technique [0002] In a high-speed optical communication system, a loss of signal (LOS) detector is located in the limiting amplifier of the receiving system to detect whether the high-speed signal of the front-stage transimpedance amplifier exists. When the input signal level is lower than the LOS detector threshold, the LOS detection circuit triggers a signal loss event, and the system disables the transmit driver to save consumption. The traditional LOS detection circuit detects the input signal at a low rate, and is affected by process, power supply voltage and temperature, and its accuracy cannot be guaranteed, which may cause the system to work abnormally u...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H03K19/20
CPCH04B10/079H03K19/20
Inventor 王晖孙振华
Owner HUAIYIN TEACHERS COLLEGE