This　paper　studies　the　problem　of　reliable　IT,　filtering　for　networked　control　systems　(NCSs)　subject　to　packet　loss　and　quantization　in　low-frequency　domain.　By　considering　the　influences　of　quantization,　packet　losses　and　possible　sensor　stuck　failures,　the　NCSs　are　modeled　as　discrete-time　switched　systems　with　constant　delays.　Subsequently,　an　analysis　condition　to　capture　low-frequency　specifications　is　presented.　With　the　aid　of　the　derived　condition,　a　procedure　of　reliable　filter　synthesis　is　given　in　terms　of　linear　matrix　inequalities　(LNIIs).　Finally,　an　example　is　given　to　illustrate　the　effectiveness　of　the　proposed　method.