光子时间拉伸模数转换(PTS-ADC)技术利用光纤中的色散效应对被采样信号进行时间拉伸和带宽压缩,可大幅提高传统模数转换器(ADC)的采样率和模拟带宽。但PTS-ADC也存在采样时间窗口有限的缺点,难以满足连续信号的采样。采用多通道结构化设计是实现PTS-ADC连续采样模式的有效办法,但也存在通道间的失配误差。本文优化了多通道结构设计方案,可用于产生连续光载波和实现连续模式采样的PTS-ADC系统,并对该方案中多通道之间的偏置误差、增益误差和时间倾斜对系统的影响进行了理论分析和数值仿真。搭建了三通道实验系统平台,验证了该方案的可行性,系统采样率超过200 GSa/s、模拟带宽可达到45 GHz、有效比特位达到3.7。 Photonic Time-Stretched Analog-to-Digital Conversion (PTS-ADC) technology uses the dispersion effect in optical fibers to time stretch and bandwidth-compress the sampled signal, dramatically improving the sampling rate and analog bandwidth of traditional analog-to-digital converters (ADCs). However, PTS-ADC also has the disadvantage of limited sampling time window, which makes it difficult to meet the sampling of continuous signal. Using multi-channel structured design is an effective way to achieve PTS-ADC continuous sampling mode, but there is also mismatch error between channels. This paper optimizes the design of multi-channel structure can be used to produce continuous optical carrier and continuous mode sampling PTS-ADC system, and the program in the multi-channel bias error, gain error and time tilt on the system The theoretical analysis and numerical simulation. A three-channel experimental system platform is set up to verify the feasibility of the scheme. The sampling rate of the system is over 200 GSa / s, the simulation bandwidth is up to 45 GHz and the effective bit is 3.7.