Impedance matching network, data transmission system and impedance matching method
An impedance matching network and matching network technology, applied in impedance matching network, transmission system, multi-terminal pair network, etc., can solve the problem of large impedance matching network area, and achieve the effect of improving accuracy and reducing scale
Pending Publication Date: 2022-03-01
新华三半导体技术有限公司
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[0003] In order to ensure the impedance matching between the data transmitter, transmission line and data receiver, an impedance matching network will be added in the data transmission system. The resistance value in the impedance matching network matches the characteristic impedance of the transmission line, and the error between the resistance value of the impedance matching network and the characteristic impedance value directly affects the effect of impedance matching, although the existing technology reduces the adjustment step size of the resistance in the impedance matching network , can reduce the difference between the resistance value of the impedance matching network and the characteristic impedance value, but the impedance matching network needs more parallel resistors in order to reduce the adjustment step size of the resistance, which will lead to an excessively large area of the impedance matching network
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[0037] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application.
[0038] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and al...
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The invention provides an impedance matching network, a data transmission system and an impedance matching method. The impedance matching network comprises a first-stage resistor network and a second-stage resistor network, the first-stage resistor network and the second-stage resistor network are connected in parallel, the first-stage resistor network is used for adjusting the number of resistors which are enabled to be connected in parallel in the first-stage resistor network under the action of a first control signal, and the second-stage resistor network is used for adjusting the number of resistors which are enabled to be connected in parallel in the second-stage resistor network. The resistance value in the impedance matching network is close to a target characteristic resistance value; and the second-stage resistance network is used for adjusting the number of resistors which are enabled to be connected in parallel in the second-stage resistance network under the action of a second control signal after the resistance value in the first-stage resistance network is adjusted, so that the resistance value in the impedance matching network reaches the target characteristic resistance value.
Description
technical field [0001] The present application relates to the technical field of integrated circuits, in particular to an impedance matching network, a data transmission system and an impedance matching method. Background technique [0002] For high-speed data transmission systems, due to the phenomenon of data reflection on the transmission line, if the impedance between the data transmitter, transmission line and data receiver does not match, it will reduce the quality of data transmission, increase the bit error rate, and then affect the speed of data transmission and reliability. Therefore, for high-speed data transmission circuits, impedance matching is particularly important. [0003] In order to ensure the impedance matching between the data transmitter, transmission line and data receiver, an impedance matching network will be added in the data transmission system. The resistance value in the impedance matching network matches the characteristic impedance of the tr...
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IPC IPC(8): H03H11/28H04B1/40
CPCH03H11/28H04B1/40
Inventor 郭建华
Owner 新华三半导体技术有限公司