Other Parts Discussed in Thread: TLC2254, TL064, OPA4132, OPA4188
Hi, support team
My customer has the questions as follow:
The supply voltage is ±5V.
Input voltage is 3V pulse signal, duration of high level is 1.6ms and the cycle is 1.2s.
When IC46 uses OPA4277, there will be a charging phenomenon (as shown in the picture below),
When remove the high pass filter capacitor C476, the charging process disappears, and the circuit is normal,
When replace OPA4277 with TLC2254 or TL064 (the high pass filter capacitor of C476 is not removed), the charging process disappears and the circuit is normal.
I tried to replace OPA4277 with OPA4132 or OPA4188. The problem remains.
I don't understand why it's OK to replace it with TLC2254, but not with OPA4277?
Pictures with problems:
Normal picture (yellow line in the figure):
Thanks so much.