Apparatus and method for performing digital infinite impulse filtering

Methods and devices for switching filters and medical apparatuses using the same

OPTIMIZED METHOD OF BIQUAD INFINITE-IMPULSE RESPONSE CALCULATION

Biquad infinite impulse response system transformation

NOISE REMOVING APPARATUS

Method and apparatus for digital up-down conversion using infinite impulse response filter

Self-adjusting voltage filtering technique compensating for dynamic errors of capacitive voltage transformers

Filtering apparatus