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The P-terminal input signal of the LMH6401 during the test. The N-terminal is grounded. At this time, some P-terminal signals will be coupled in the N-terminal, resulting in the input signal of the LMH6401 becoming two signals in the same phase. The amplitude of the p-terminal is larger, and the signal coupled in the N is smaller, resulting in a smaller output signal amplitude of the LMH6401. Is it because of the connection method of the P and N inside the LMH6401?
Then this situation causes the N terminal to be grounded. There will also be a signal from the P terminal coupled in, indicating that this chip can only input differential. Can't input a single-ended signal?
