METHODS AND SYSTEMS FOR INTERFERENCE REJECTION FOR LOW SIGNALS
摘要
A radio device and a method to operate a non-heterodyne receiver are provided. The radio device is configured to receive a signal waveform and to provide a wake-up signal to a second communication circuit when the signal waveform is a valid communication request; wherein the second communication circuit switches from a power saving state to an operating state upon receiving the wake-up signal from the non-heterodyne receiver. The non-heterodyne receiver further including an Electromagnetic interference (EMI) rejection circuit, including a narrow band filter and a broadband filter to reject an EMI signal. A filter circuit for a narrow passband circuit is also provided. The filter including a buffer circuit; a crystal oscillator coupled to the output of the buffer circuit; and an inverting amplifier coupled in parallel to the crystal oscillator.
申请公布号
WO2012092516(A3)
申请公布日期
2012.11.01
申请号
WO2011US67960
申请日期
2011.12.29
申请人
SECUREALL CORPORATION;SHARMA, ARUN KUMAR;WURM, MICHAEL