Hertzilla
Newbie level 4
I used TI's "WEBENCH Filter Designer" online to design a 4 pole low pass filter. The cutoff freq. is 10.5 kHz.
The pass band gain of the circuit is unity, but what I actually need is a gain of -6.5 dB @ 1 kHz. The software won't let me enter negative numbers, so I can't determine what I need to change.
I'm guessing that I may need to add a resistor in the negative feedback loop of one or both stages to reduce the gain(?) ...I don't want to change the specs of the existing circuit other than the gain.
-Thanks
![lp.filter.jpg lp.filter.jpg](https://www.edaboard.com/data/attachments/53/53909-525cebf3ad523d4505b2f513c5d93790.jpg)
The pass band gain of the circuit is unity, but what I actually need is a gain of -6.5 dB @ 1 kHz. The software won't let me enter negative numbers, so I can't determine what I need to change.
I'm guessing that I may need to add a resistor in the negative feedback loop of one or both stages to reduce the gain(?) ...I don't want to change the specs of the existing circuit other than the gain.
-Thanks
![lp.filter.jpg lp.filter.jpg](https://www.edaboard.com/data/attachments/53/53909-525cebf3ad523d4505b2f513c5d93790.jpg)
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