11. The transfer function of the Butterworth low pass filter can be expressed in terms of polynomial and poles. 12. Unless the system naturally has sufficient damping, many negative feedback systems have low pass filters or dampers fitted. 13. This results in a " smoothing " or integration of the output, similar to a low pass filter . 14. Usually, these are removed with a low pass filter acting as a reconstruction filter in applications that require it. 15. This gives the L-network the additional feature of harmonic suppression since it is a low pass filter too. 16. Under Cisco's pre-standard scheme, the PSE ( switch ) will send a low pass filter . 17. Both infinite impulse response and finite impulse response low pass filters as well as filters using Fourier transforms are widely used. 18. First the samples are passed through a low pass filter with impulse response g resulting in a convolution of the two: 19. The light bulb has thermal inertia so that its power to resistance transfer function exhibits a single pole low pass filter . 20. A diagram of the circuit topology for a second order low pass filter is shown in the figure on the right.
