A type of biquad filter that simultaneously provides second-order low-pass, high-pass, and band-pass filtering in one network (see diagram).
State variable filter
- radiometry
- radio noise
- radionuclide
- radio occultation
- radiopaque
- radiopharmaceuticals
- radio receiver
- radio relay
- radio science system
- radio set
- radio site
- radiosity
- radiosonde
- radio source
- radio spectroscope
- radio star
- radio telegraphy
- radio telemetry
- radio telephone
- radio telescope
- radiotherapy
- radio transmission
- radiotransparent
- radio wave
- radiowave