A Programmable Signal Amplitude Detection Circuit

Abstract

A programmable signal amplitude detection circuit of the present invention includes an amplitude detection circuit and a comparator circuit, and the amplitude detection circuit is used to detect an externally input differential signal CK P with CK N magnitude to a preset threshold reference voltage V T As a reference, the output reflects the differential signal CK of the external input P with CK N The magnitude of the magnitude of the magnitude detection voltage V A to the comparator circuit, for a certain threshold reference voltage V T , amplitude detection voltage V A It is inversely proportional to the differential signal amplitude of the external input, and for a certain differential signal amplitude of the external input, the amplitude detection voltage V A with the threshold reference voltage V T Proportional; comparator circuit for comparing amplitude detection voltage V A and the reference comparison voltage V R , and generate an amplitude indicating signal Q C , used to indicate whether the voltage amplitude is strong enough. The invention can be used in high-speed signal receiving, automatic gain control and other circuits to realize flexible control of high-speed signal amplitude.

Description

technical field [0001] The invention relates to a programmable signal amplitude detection circuit, which belongs to the technical field of high-speed data interface. Background technique [0002] The data transmission rate in military electronic equipment such as broadband communication, radar navigation and electronic countermeasures continues to increase. Due to the limited bandwidth of the transmission channel, for high-speed clock and data signals with a frequency exceeding 5 GHz, the signal distortion and distortion are generally reduced by controlling the signal amplitude, so as to achieve high-speed and high-reliability signal transmission, and at the same time reduce the power consumption of the signal transmission system; however, Since the signal will be affected by non-ideal factors such as noise and mismatch during transmission, too small signal amplitude may reduce the signal-to-noise ratio of the signal, causing high-speed data errors or high-speed clock signal...

AI Technical Summary

Problems solved by technology

Due to the limited bandwidth of the transmission channel, for high-speed clock and data signals with a frequency exceeding 5 GHz, the signal distortion and distortion are generally reduced by controlling the signal amplitude, so as to achieve high-speed and high-reliability signal transmission, and at the same time reduce the power consumption of the signal transmission system; however, Since the signal will be affected by non-ideal factors such as noise and mismatch during transmission, too small signal amplitude may lead to a decrease in the signal-to-noise ratio of the signal, causing high-speed data errors or high-speed clock signal quality deterioration

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