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LME49600 LME49720 Headphone Amp TINA Simulation Fail

Other Parts Discussed in Thread: LME49600TSBD, TINA-TI

Hello again,

I've recently built a stripped down version of the LME49600TSBD headphone amp in TINA-TI to simulate it. All measurements analysed well except for Square Wave. I placed a 10mA, 10kHz, 10ns square wave at the input and got a wildly oscillating transient response.

I've stripped the DC servo, and only simulated one channel in to a 25 Ohm load.

Can I get some assistance with making sense of this?