DAC
3.28 kΩ
+ 15 V
After adding a 3.28 kΩ resistor to the input, we consistently
observed a significant peak (not expected) in the power
spectrum between 200 kHz and 1 MHz across all three
amplifiers purchased from you. This phenomenon was also
verified in an older amplifier previously purchased from
your company, where the expected spectrum (violet) was
obtained.