Patent ID: 7933358

Claim:
A Gaussian Frequency Shift Keying/Frequency Shift Keying (GFSK/FSK) modulation circuit implemented in a digital manner comprising: a frequency divider for dividing frequency of an inputted clock signal to get a sampling signal; a buffer coupled to the frequency divider for storing inputted data; an integrator coupled to the buffer for processing integration according to the data outputted from the buffer; a first read only memory coupled to the integrator for transferring the data outputted from the integrator according to a cosine function; a second read only memory coupled to the integrator for transferring the data outputted from the integrator according to a sine function; and a third read only memory coupled to the frequency divider, the buffer and the integrator, the third read only memory is used for storing the data after the frequency divider over-samples the data of the buffer and transferring the data after over-sampling according to a Gaussian function to the integrator.