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Part Number: TLV9062
Tool/software: TINA-TI or Spice Models
I'd like to simulate the noise by TINA, the circuit is as below. There are 2 stage pass band filter, and the parameters of each stage are the same. The high pass corner frequency is about 110Hz, and the low pass frequency is about 1.3kHz, the gain of each stage is 120.
The noise of first stage at VF1 is about 120uV, the same as I calculated by hand. For the second stage, the gain is 120, the first stage noise should be amplified by 120 and at least 120*120uV=14.4mV. Why the total noise at VF2 is only 10.59mV?
I have checked the bode plot, the gain and the corner frequency is as expected.
Could you please help me? Thank you！
Regards,Ronald MichallickLinear Applications
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In reply to Ron Michallick:
In reply to Cera Wei:
Your output noise signal at VF1 is amplified by the noise gain on the third stage, not the signal gain. The remaining region is attenuated as shown in the image below.
Please let me know if there is anything else I can assist you with.
In reply to Ramon Jimenez:
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