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System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags
System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags
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机译:用于为符合EPC0的RFID标签中的RF AM信号提供低功率低压数据检测电路的系统和方法
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摘要
A system and method is disclosed for demodulating RF amplitude modulated signals in a demodulator circuit of an EPCO compliant RFID tag. One advantageous embodiment of the invention comprises first and second input ports, a +ve envelope detector circuit for each of the first and second input ports, a −ve envelope detector circuit for each of the first and second input ports, a +ve envelope differentiator circuit, a +ve low pass filter, a −ve envelope differentiator circuit, a −ve low pass filter, and a zero crossing detector. The zero crossing detector detects a transition in the RF input signal using a voltage difference between a +ve filtered differentiated envelope signal and a −ve filtered differentiated envelope signal.
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