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FM TRANSMITTER AND NON-FM RECEIVER INTEGRATED ON SINGLE CHIP
FM TRANSMITTER AND NON-FM RECEIVER INTEGRATED ON SINGLE CHIP
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机译:集成在单芯片上的FM发射器和非FM接收器
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摘要
Exemplary embodiments include a frequency modulation (FM) transmitter and a non-FM receiver, which may be implemented on the same IC chip. The FM transmitter may include a digital FM modulator, a low pass filter, an amplifier, and an LC tank circuit. The digital FM modulator may receive a digital input signal, perform FM modulation with the digital input signal, and provide a digital FM signal. The low pass filter may filter the digital FM signal and provide a filtered FM signal. The amplifier may amplify the filtered FM signal and provide an output FM signal. The LC tank circuit may filter the output FM signal. The digital FM modulator may perform FM modulation by changing a variable divider ratio of a multi-modulus divider within a PLL. A delta-sigma modulator may receive the digital input signal and generate a modulator output signal used to obtain the variable divider ratio.
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