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UC3843斜坡补偿问题

Other Parts Discussed in Thread: UC3843

现在使用UC3843作为控制芯片做一款有源正激变换器,

关于Isense端的斜坡补偿的引入有以下疑问,DATASHEET中推荐使用三极管构成的射随引入斜坡补偿

然而,我认为:

RT/CT的波形为+1V to +3V的三角波,直接通过射随加上去电压不会过高吗?是否应该用电容隔直?