PROGRAMMABLE DEMODULATION FREQUENCY MIXER CAPABLE OF ADJUSTING AN OUTPUT SIGNAL BY PROGRAMMING A SYMBOL AND A PATH OF INTERNAL SIGNALS

摘要

PURPOSE: A programmable demodulation frequency mixer is provided to improve the performance of a transceiver by reducing a process band width of the transceiver, power consumption, and the size of a chip.;CONSTITUTION: A programmable demodulation frequency mixer(20) includes an I/Q signal changing unit(210), a mixer unit(220), and a calculating unit(230). The mixer unit changes an I signal and a Q signal inputted from an I/Q signal input unit according to an oscillation signal generated from an oscillator. The calculating unit adds up or deducts the I and Q signals inputted the mixer unit in order to generate an output signal. The I/Q signal changing unit adjusts a path and a symbol of the I and Q signals inputted from the calculating unit or the mixer unit according to an I/Q control signal.;COPYRIGHT KIPO 2013;[Reference numerals] (10) I/Q signal input unit; (211) First I/Q signal changing part; (212) Second I/Q signal changing part; (231) First calculator; (232) Second calculator; (240) Oscillator; (250) Oscillation signal changing unit; (30) I/Q signal processing unit