High-speed serial port load automatic calibration circuit
A high-speed serial port and automatic calibration technology, which is applied in the direction of logic circuit connection/interface layout, multiple input and output pulse circuits, etc., can solve the problems of reducing test application efficiency, varying length and complexity of the adjustment process, and achieving efficiency improvement. Ensure stable performance and improve product yield
Inactive Publication Date: 2015-12-02
58TH RES INST OF CETC
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Benefits of technology
This technology helps create better quality communication systems with faster data transfer rates over long distances without sacrificing signal strength or stability. It uses an analog device called a power meter connected between two ports on different devices (such as computers) instead of just one connection point. By comparing voltages from both ends of each line pair, it becomes possible to determine if there are any problems like short circuits at certain points along its length. Additionally, this method allows for precise control of resistors used in the circuitry, resulting in improved electrical characteristics and reduced noise interference during transmitting signals across multiple wires simultaneously. Overall, these technical improvements help make reliable connections more efficient and effective in various types of applications where speedy data transfers may be necessary.
Problems solved by technology
The technical problem addressed in this patents relates to improving the performance of high speed digital interfaces (HSS) while reducing reflection caused by factors like voltage fluctuations on wires due to variations in environmental temperatures during operation.
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[0020] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0021] Such as figure 1 As shown, a high-speed serial port load automatic calibration circuit described in the present invention includes a first current source I1, a second current source I2, a port load resistor array 1, a high-precision resistor R REF , comparator 3, digital state machine 4 and high-speed serial port resistor array 2. One end of the port load resistance array 1 is connected to an analog power supply, the other end is connected to the input end of the first current source I1, and the output end of the first current source I1 is grounded; the high-precision resistor R REF One end of one end is connected to the analog power supply AVDD, and the
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The invention relates to a high-speed serial port load automatic calibration circuit. One end of a port load resistor array of the high-speed serial port load automatic calibration circuit is connected with an analog power supply, the other end is connected with an input end of a first current source, and an output end of the first current source is connected to the ground; one end of a high-precision resistor is connected with an analog power supply, the other end is connected with an input end of a second current source, and an output end of the second current source is connected to the ground; one end of a high-speed serial port resistor array is connected with an analog power supply; a negative input end of a comparator is connected between the port load resistor array and the first current source, a positive input end is connected between the high-precision resistor and the second current source, the comparator compares voltage values of the high-precision resistor and the port load resistor array and outputs a comparison result signal to a digital state machine, the digital state machine generates a control signal to control resistance of the port load resistor array and the high-speed serial port resistor array. The high-speed serial port load automatic calibration circuit provided by the invention realizes automatic calibration of the high-speed serial port load resistor, and achieves an impedance matching effect of a high-speed serial port.
Description
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