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US 12,015,447 B2Granted
Microcontroller and signal modulation method
AssigneeNuvoton Technology Corporation
InventorYun-Kai Lai
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Abstract
A microcontroller includes a setting unit, an encoder, a modulation circuit, and a digital-to-analog converter. The setting unit outputs a control signal. The encoder outputs a digital signal that is encoded. The modulation circuit loads at least one carrier signal on the digital signal at the logic high level and/or the logic low level according to the control signal to generate a modulated digital signal. The digital-to-analog converter converts the modulated digital signal into an analog signal, and outputs the analog signal for transmission.
Claims14
A microcontroller, comprising:
- an encoder, receiving a data signal, and encoding the data signal to output a digital signal that is encoded;
- a modulation circuit, loading a first carrier signal on the digital signal at logic high level and loading a second carrier signal on the digital signal at logic low level according to a control signal to generate a modulated digital signal, wherein a frequency of the first carrier signal is different from a frequency of the second carrier signal;
- wherein the control signal is generated by the microcontroller, and wherein the control signal comprises number of samples per period of the digital signal, interval period of sampling the digital signal, amplitude of the first and second carrier signals, bias of the first and second carrier signals, and interval period of the modulated digital signal;
- and
- a digital-to-analog converter, converting the modulated digital signal into an analog signal, and outputting the analog signal for transmission.
2 more elements
A method of signal modulation, comprising:
- receiving a control signal and a data signal, wherein the control signal comprises number of samples per period of the digital signal, interval period of sampling the digital signal, amplitude of the first and second carrier signals, bias of the first and second carrier signals, and interval period of the modulated digital signal at the output;
- encoding the data signal to generate a digital signal that is encoded;
- loading a first carrier signal on the digital signal at logic high level and loading a second carrier signal on the digital signal at logic low level according to the control signal to generate a modulated digital signal, wherein a frequency of the first carrier signal is different from a frequency of the second carrier signal;
- and
- converting the modulated digital signal into an analog signal, and outputting the analog signal for transmission.
2 more elements
Dependencies are inferred from the claim text.