THP210: Geophone amplifier

Lkhagvajantsan Damdinsuren

Part Number: THP210

Tool/software:

Hello Raymond,

Thank you for suggesting the circuit. Could you please share the transient analysis screenshot, here I have not good results.

Please check that there will be 54 Ohm feedback resistor from first stage output to RC network.

Thank you for ppt presenting the simulation of geophone, it is very interesting and we will try definetely.

Also page 16 mentions Up next, for example Geophone amplifier designs, are you able to share this document?

Best regards,

Lhagva

11 months ago

0 Raymond Zhang1 11 months ago

TI__Guru* 77501 points

Hi Lhagva,

Lkhagvajantsan Damdinsuren said:
Could you please share the transient analysis screenshot, here I have not good results.

I made a typo in the previous simulation. Here is the new one.

If you want to convert the dual supply to single supply in OPAx210 in two stages, it may not be doable. The reason is that I am unable to control the bias voltage at Vp node. You may need to more complicate feedback system to keep track of feedback loop (this is a complex transfer function.). The output and Vp are a function of input frequency.