The　existing　schemes　of　analog-to-information　converter　(AIC)　typically　employ　analog　circuitry.　However,　the　analog　modules　tend　to　introduce　non-linearity　into　the　system.　This　paper　presents　a　new　scheme　of　AIC　with　a　pre-quantized　random　demodulator　(RD)　which　is　dominated　by　digital　technology　for　overcoming　non-linearity.　The　analog　multiplier　is　replaced　by　the　amplitude-to-pulse　converters　to　achieve　the　multiplication　of　input　signals　with　pseudo-random　sequence　and　the　conversion　of　voltage　amplitude　to　pulse　width.　Then,　only　all-digital　modules　such　as　counters　and　subtracters　are　required　to　complete　the　quantization,　integration,　and　sampling　for　the　analog-to-information　conversion,　which　facilitates　to　greatly　reduce　the　non-linearity.　The　experimental　results　demonstrate　the　accuracy　improvement　of　the　analog-to-information　conversion　by　pre-quantized　RD.　©　2020　IEEE.