guillermorf
New Member
Hi, first of all i must say i´m not English and excuse me if this thread doesnt fit in this theme.
My problem is that i´m designing a passband-filter, with 2 stages for a highpass filter and with 4 stages for the low-pass filter. I´m using operational amplifiers THS3001 which are supposed to work in this design.
The thing is that in every very stage there is an oscillating signal in the inversive-pin of the amplifier. I´ve tried to isolate every stage and the signal is still there, and the last thing I tried was to not introduce a sine wave in the opAmp but there is still a signal on the inversive-pin.
I hope anyone can help me to solve my problem.
Thanks in advance.
Here i leave you the 2 stages of the highpass filter. The thing is that i have the same problem when all the circuit is connected and when i have just the first stage and without introducing any signal through Vin.
**broken link removed**
My problem is that i´m designing a passband-filter, with 2 stages for a highpass filter and with 4 stages for the low-pass filter. I´m using operational amplifiers THS3001 which are supposed to work in this design.
The thing is that in every very stage there is an oscillating signal in the inversive-pin of the amplifier. I´ve tried to isolate every stage and the signal is still there, and the last thing I tried was to not introduce a sine wave in the opAmp but there is still a signal on the inversive-pin.
I hope anyone can help me to solve my problem.
Thanks in advance.
Here i leave you the 2 stages of the highpass filter. The thing is that i have the same problem when all the circuit is connected and when i have just the first stage and without introducing any signal through Vin.
**broken link removed**
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