Frequency shift keying transmitter

摘要

According to embodiments of the present invention, a frequency shift keying transmitter is provided. The frequency shift keying transmitter includes a logic gate arrangement that produces an output signal having a frequency that depends on input signals to the logic gate arrangement, a clock generator coupled to the logic gate arrangement, the clock generator adapted to produce a clock signal, and a sampling arrangement coupled to the logic gate arrangement, the sampling arrangement adapted to receive a data signal, wherein the sampling arrangement is configured to sample the clock signal to generate periodic waveforms delayed from each other by an interval determined by the point the clock signal is sampled, wherein the sampling arrangement is configured to be controlled by the data signal to have the logic gate arrangement select periodic waveforms that are delayed from each other by one of a set of intervals associated with the data signal, to be used as the input signals to the logic gate arrangement to produce the output signal.

主权项

1. A frequency shift keying transmitter comprising:
a logic gate arrangement that produces an output signal having a frequency that depends on input signals to the logic gate arrangement; a clock generator coupled to the logic gate arrangement, the clock generator adapted to produce a clock signal; and a sampling arrangement coupled to the logic gate arrangement, the sampling arrangement adapted to receive a data signal, wherein the sampling arrangement is configured to sample the clock signal to generate periodic waveforms delayed from each other by an interval determined by the point the clock signal is sampled, wherein the sampling arrangement is configured to be controlled by the data signal to have the logic gate arrangement select periodic waveforms that are delayed from each other by one of a set of intervals associated with the data signal, to be used as the input signals to the logic gate arrangement to produce the output signal, wherein the selected periodic waveforms are merged to produce the output signal, wherein the sampling arrangement comprises a delta-sigma modulator coupled to a frequency interpolator, the delta-sigma modulator configured to receive the data signal and providing sampling data to the frequency interpolator, the frequency interpolator configured to produce the input signal byFinf=1Tclk-(K2m×Tclk12)⁢⁢for⁢⁢0≤K≤2mwhere K and m are the input control word and the input bit resolution of the delta-sigma modulator respectively, and Tclk is an average clock period related to the input control word K;
and wherein the output signal is a frequency shift keying signal.