Disclosed is a multi-channel signal receiver technology. An RF front-end in an RF receiver receiving at least two RF signals with different transmission bandwidths includes: at least two RF tuners receiving, amplifying, and frequency-converting the at least two RF signals, respectively; a switch selecting one of signals output from the at least two RF tuners; a channel filter eliminating interference signals included in a signal output from the switch, and passing a signal of a transmission band; an ADC converting the signal output from the channel filter into a digital signal; a fixed sampling frequency generator generating and transferring a fixed sampling frequency to the ADC.In the RF front-end, by processing filtering and sampling of signals with a narrow transmission bandwidth through a residual calculation capacity of a digital processor a construction of an RF front-end may be simplified and manufacturing costs may be reduced.