Adaptive equalization circuit and its method

Abstract

The invention discloses an adaptive equalization circuit which is suitable for compensating a signal transmitted by a channel and comprises a signal gaining unit, an amplifying unit and an adaptive control circuit, wherein the signal gaining unit receives the signal, adjusts the gain to the signal and outputs the signal after adjustment; the amplifying unit is coupled with the signal gaining unit and amplifies and outputs the signal to the next level of circuit; the adaptive control circuit is coupled with the signal gaining unit, detects the ratio of the maximum value to the minimum value of a packet of the signal and outputs an adjustment signal; by adjusting the gain value of the signal gaining unit through the adjustment signal, the maximum value or the minimum value is changed, so that the ratio of the maximum value to the minimum value is not less than a specified value. In addition, the invention also discloses an adaptive equalization method.

Description

technical field [0001] The present invention relates to an equalizer circuit and its method, and in particular to an adaptive equalizer circuit (adaptive equalizer) and its method. Background technique [0002] Generally speaking, for high-speed transmission signals, the signal strength may be attenuated after passing through the channel, so that the signal strength is too small and the noise disturbance (jitter) is too large, and the transmission result will increase the bit error rate and affect the communication quality. figure 1 That is, it shows the transmission waveform of each part of the signal in the electronic system and its eye diagram. Please refer to figure 1 After the signal S1 is strengthened by the driver 110 at the sending end of the electronic system 100, it enters the channel 130 for transmission. Before entering the channel for transmission, it can be seen from the eye diagram output by the driver 110 that the signal S1 has good signal quality. However...

AI Technical Summary

Problems solved by technology

[0004] However, for practical applications, the channel loss is not fixed, and the known compensation methods must have an adaptive control device to detect whether the high-frequency compensation is optimized

However, many current architectures have many restrictions on the practicality of adaptive control, such as too complex circuit architecture, difficulty in achieving gigabytes per second (Gbps) transmission speed, or low compensation accuracy in mass production.

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