| 摘要 |
PROBLEM TO BE SOLVED: To provide an FSK demodulator which outputs a detection signal insusceptible to affection of noise.SOLUTION: An FSK demodulator comprises: a logic circuit 70 to which an in-phase component and an orthogonal component of an FSK modulated modulation wave are input and which generates a detection signal on the basis of both of the components; and a determination circuit 80 which generates a data signal representing data included in the modulation wave by comparing the detection signal with a determination threshold of a signal level. The logic circuit 70 modifies a calculating formula for generating a detection signal on the basis of a phase difference so that the detection wave becomes a unique value for the phase difference between a modulation wave at a first time and a modulation wave at a second time different from the first time. |
