I am having issues with a common SE to Differential conversion circuit basing on two Op Amps as shown in simulation. The problem I have is oscillations around 1-2 MHz on output. I added a capacitor in parallel to R1 (180 pF), tried different opamps (AD8513, ADA4898, OP4177, OP4227) - frequency shifts, amplitude differs but oscillations still occur. LTSpice shows a peak of gain near 2 MHz.
Could anyone explain my why this happens? What can I do to remove it?