Continuous time linear equalizer and signal transceiving circuit

Abstract

The embodiment of the invention discloses a continuous time linear equalizer and a signal transceiving circuit. The continuous time linear equalizer comprises an input end, an output end and a differential amplification circuit electrically connected with the input end and the output end respectively, and the differential amplification circuit comprises a first branch circuit and a second branch circuit which are connected in parallel; the first frequency compensation circuit and the at least one second frequency compensation circuit are electrically connected between the first branch circuit and the second branch circuit, and the first frequency compensation circuit, the second frequency compensation circuit and the second frequency compensation circuits are connected in parallel; the first frequency compensation circuit is at least used for compensating high-frequency loss; the second frequency compensation circuit is at least used for compensating medium-low frequency loss; wherein the first frequency compensation circuit is an RC parallel circuit, and the second frequency compensation circuit is an RC series circuit. According to the embodiment of the invention, high-frequency signals and low-frequency signals can be compensated at the same time, and the accuracy of signal transmission is ensured.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of signal transceiving, and in particular, to a continuous-time linear equalizer and a signal transceiving circuit. Background technique [0002] A Continuous Time Linear Equalizer (CTLE) is a core device at a signal receiving end or a signal output end of a communication system. Taking the signal receiving end in the optical communication system as an example, the transimpedance amplifier in the signal receiving end converts the tiny current signal output by the photodiode into a larger voltage signal as the input signal of CTLE. Due to non-ideal factors such as parasitic capacitance and skin effect in the transmission channel and transimpedance amplifier, the signal will suffer a large transmission loss in the middle and low frequency bands and high frequency bands. [0003] In the prior art, CTLE usually uses a MOS transistor as a differential amplifier, and the drain is connected t...

AI Technical Summary

Problems solved by technology

Due to non-ideal factors such as parasitic capacitance and skin effect in the transmission channel and transimpedance amplifier, the signal will suffer a large transmission loss in the middle and low frequency bands and high frequency bands

[0003] In the prior art, CTLE usually uses a MOS transistor as a differential amplifier, and the drain is connected to a series resistor and inductor as an output terminal, and the parallel resistor and capacitor are coupled to the source stage of the MOS transistor, using inductance peaking technology and capacitance degradation technology The two zero points introduced in the high frequency band, and due to non-ideal factors such as skin effect and dielectric loss, the signal will also experience serious signal loss in the middle and low frequency bands, which makes the signal distorted, and the CTLE of the prior art cannot correct Compensation for mid- and low-frequency signals, resulting in signal distortion

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