A voltage swing control circuit of cam matching line
A technology for controlling circuit and voltage swing, applied in information storage, static memory, digital memory information and other directions, can solve the problems of large voltage swing and high power consumption of CAM matching line
Active Publication Date: 2020-08-04
新华三半导体技术有限公司
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Problems solved by technology
[0003] In related technologies, when the CAM unit connected to the CAM matching line determines that the data to be searched does not match the stored data, the CAM matching line will discharge through the channel between the ground and the ground to reduce the voltage, so the voltage of the CAM matching line It will drop from high potential to 0, resulting in a large voltage swing, which in turn leads to higher power consumption of the CAM match line
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[0034] 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 examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0035] The terminology used in the present disclosure is for the purpose of describing particular embodiments only, and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, 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...
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The invention provides a voltage swing control circuit of a CAM matching line. The voltage swing control circuit comprises an inverting circuit and a control circuit, one end of the inverting circuitis connected with the CAM matching line, the other end of the inverting circuit is connected with the control circuit, and the inverting circuit is used for inverting the voltage of the CAM matching line to obtain a first voltage signal and outputting the first voltage signal to the control circuit; the control circuit is used for determining whether to control the pull-down channel between the CAM matching line and the ground to be disconnected or not according to the first voltage signal. According to the invention, when the data of the CAM is not matched; when the voltage of the CAM matching line is reduced to the conversion point voltage corresponding to the inverting circuit; a high-potential first voltage signal is obtained by inverting a phase inverter circuit and then input to a control circuit to disconnect a channel between a CAM matching line and the ground, and the voltage of the CAM matching line is maintained at a target voltage which is a high potential between a conversion point voltage and 0. The voltage of the CAM matching line can be prevented from being reduced to 0, so that the voltage swing of the CAM matching line can be reduced, and the power consumption ofthe CAM matching line is reduced.
Description
technical field [0001] The present disclosure relates to the field of semiconductors, in particular to a voltage swing control circuit of a CAM matching line. Background technique [0002] CAM (content addressable memory, content addressable memory) is a memory that is addressed by content, and is a special storage array RAM (Random Access Memory, random access memory). Its main working mechanism is to compare the input data to be searched with the stored data in the CAM in parallel, judge whether the data to be searched matches the stored data in the CAM, and output the stored data corresponding to the searched data when they match. The storage address of the data, and then read out the corresponding storage data according to the storage address. [0003] In related technologies, when the CAM unit connected to the CAM matching line determines that the data to be searched does not match the stored data, the CAM matching line will discharge through the channel between the gr...
Claims
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IPC IPC(8): G11C15/04G11C5/14
CPCG11C5/147G11C15/04
Inventor 郭建华
Owner 新华三半导体技术有限公司