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Filter Design
2nd Order Low-Q Active Filter Design  
This tool calculated the required resistor and capacitor values for a second order low-Q active filter. The routine assumes the input signal swing will be differential peak swing of 80%*VDD. Given the SNR, and the swing the resistor and capacitors can be sized. The filter has all real poles and thus the Q is limited to 0.5.

Single Pole Active Filter Design  
This tool calculated the required resistor and capacitor values for a single pole active filter. The routine assumes the input signal swing will be differential peak swing of 80%*VDD. Given the SNR, and the swing the resistor and capacitors can be sized.

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ANALOG FILTERS
Sallen-Key Mathcad filters routine:
Extensive Mathcad routine for designing integrated Sallen-Key filters
Mathcad routine for Butterworth filters:
Mathcad routine for LC Butterworth filters
Mathcad routine for elliptic filters:
Mathcad routine for LC elliptic filters
Mathcad routine for Chebyshev filters:
Mathcad routine for LC Chebyshev filters
2nd Order Low-Q Active Filter Design:
This tool calculates the required resistor and capacitor values for a second order low-Q active filter.
Single Pole Active Filter Design:
This tool calculates the required resistor and capacitor values for a single pole active filter.