Programmable ASK demodulator
By designing an adjustable ASK demodulator, the development challenges of ASK demodulators with wide dynamic range and wide frequency range were solved, achieving low current consumption and high-speed asynchronous demodulation, suitable for various signal types and application scenarios.
CN114257483BActive Publication Date: 2026-06-02NXP BV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NXP BV
- Filing Date
- 2021-09-23
- Publication Date
- 2026-06-02
Smart Images
Figure CN114257483B_ABST
Abstract
Various embodiments relate to an amplitude shift keying (ASK) demodulator for demodulating an input signal, comprising: a frequency filter configured to receive the input signal, wherein the frequency filter comprises an adjustable component configured to adjust a frequency response of the frequency filter; a rectifier configured to rectify an output of the frequency filter, wherein the rectifier comprises an adjustable current source configured to adjust a current consumption of the rectifier; a reference signal generator configured to generate a reference signal; a current-to-voltage converter configured to convert a current of the rectified signal into a rectified voltage and to convert a current of the reference signal into a reference voltage; and a comparator configured to compare the rectified voltage to the reference voltage and to generate a demodulated output signal.
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