Dear All:
I want to make a virtual ground circuit with 100 ma of output current like the reference picture:
If I use the Opamp LM741 which has 1.5 mhz of bandwidth in the virtual ground circuit, does the virtual ground will work well with an audio amplifier which has an opa2134 (8 Mhz BandWidth)?
I summary, I would like to know if the virtual ground opamp must have the same bandwidth that the amplifier opamp.
I would like to make a virtual ground circuit for a high speed CFB amplifier THS3201, and I need to know If I can use an opa2134 or Lm741 with a Buf634 in the virtual ground circuit included in the picture.
source: Virtual Ground Circuits
Regards.
Alfredo Mendiola Loyola
Lima, Peru
I want to make a virtual ground circuit with 100 ma of output current like the reference picture:
If I use the Opamp LM741 which has 1.5 mhz of bandwidth in the virtual ground circuit, does the virtual ground will work well with an audio amplifier which has an opa2134 (8 Mhz BandWidth)?
I summary, I would like to know if the virtual ground opamp must have the same bandwidth that the amplifier opamp.
I would like to make a virtual ground circuit for a high speed CFB amplifier THS3201, and I need to know If I can use an opa2134 or Lm741 with a Buf634 in the virtual ground circuit included in the picture.
source: Virtual Ground Circuits
Regards.
Alfredo Mendiola Loyola
Lima, Peru
The virtual ground would normally be closely decoupled to what have now become the - and + rails. Speed of the opamp doesn't really figure in this although for various reasons the 741 isn't the best choice (current consumption and input bias currents).
You might find it an advantage to decouple the resistive divider as well. Its a high impedance node and susceptible to noise pickup.
You might find it an advantage to decouple the resistive divider as well. Its a high impedance node and susceptible to noise pickup.
- Status
- Not open for further replies.