A sampling method and device for high-speed serial signals in serdes technology

Abstract

The invention discloses a method and a device for sampling a high-speed serial signal in a SerDes technology. The method comprises the following steps of (1) receiving an original signal at a Serializer receiving terminal, taking a clock with the degrees of 0, 45, 90, 135, 180, 225, 270 and 315 as a sampling clock, and outputting an initial sampling signal under the control of each phase of the sampling clock; and (2) shifting the phase of the clock with the degrees of 45, 135, 225 and 315 in a 8-phase sampling clock forwards for 45 degrees, keeping the rest four phases invariable to obtain a phase adjustment clock, controlling eight initial sampling signals to perform phase adjustment, acquiring four groups of sampling signals of which every two are the same, performing synchronous latch, and outputting the signals to a subsequent deserializer. The device comprises eight parallel sampling modules, eight phase adjustment modules and a phase shifting module. The method has the advantages of simple implementation method, low cost, integral sampling data and high efficiency.

Description

technical field [0001] The invention relates to the technical field of SerDes, in particular to a sampling method and device for high-speed serial signals in the SerDes technology. Background technique [0002] With the rapid development of integrated circuit technology, the interconnection of computing or communication platforms requires higher and higher data transmission rates, and bus performance has become a bottleneck restricting system performance. Buses such as RapidIO, PCIe, Hypertransport, and InfiniBand introduced in recent years are dedicated to interconnecting peripheral devices such as computing and communication platform applications, providing high-speed, high-performance, point-to-point, full-duplex, and differential signal links for interconnected devices The I / O serial bus has broad application prospects. To realize these serial protocol standards, the key SerDes (Serializer / Deserializer, Serializer / Deserializer) technology is inseparable. SerDes means s...

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Problems solved by technology

[0005] Natural sampling (SPWN) is to control the on-off of the power switch at the natural intersection of the sine wave and the triangular wave. The obtained SPWN wave is very close to the sine wave, but this method requires solving complex transcendental equations, and it takes a lot of time to use the microcomputer control technology. A lot of time, difficult to calculate online in real-time control, so use less

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