OOK (on-off keying) receiving device with low power consumption

Abstract

The invention discloses an OOK (on-off keying) receiving device with low power consumption, which comprises a radio-frequency filter, a lower current multiplexing quadrature mixer, a fully-differential annular oscillator, an image rejection broadband intermediate frequency amplifier, an envelope detector, a high-precision comparator and a digital frequency calibrator, wherein the input end of the radio-frequency filter is connected with an antenna; the input end of the lower current multiplexing quadrature mixer is connected with the output end of the radio-frequency filter; the output end of the fully-differential annular oscillator is connected with the input end of the lower current multiplexing quadrature mixer; the input end of the image rejection broadband intermediate frequency amplifier is connected with the output end of the lower current multiplexing quadrature mixer; the input end of the envelope detector is connected with the output end of the image rejection broadband intermediate frequency amplifier; the input end of the high-precision comparator is connected with the output end of the envelope detector; and the output end of the digital frequency calibrator is connected with the input end of the fully-differential annular oscillator, and the digital frequency calibrator is used for carrying out digital calibration on the output frequency of the fully-differential annular oscillator.

Description

technical field [0001] The invention relates to the technical field of wireless radio frequency receiver chips, in particular to an ultra-low power consumption amplitude shift keying (OOK) receiving device. Background technique [0002] In wireless sensor networks, wireless body area networks and other application fields, wireless receivers undoubtedly play an extremely important role. In these applications, first of all its power consumption must be very low to prolong the service life of the battery, because replacing the battery in many applications is very costly or even almost impossible. It is worth mentioning that in some applications, the tolerance for power consumption is limited to a few hundred microwatts. Secondly, it is required that the radio frequency receiver can be integrated with other analog sensors and digital processors on the same CMOS chip to increase stability and reduce costs. Therefore, it is a key technology to integrate an ultra-low power consum...

AI Technical Summary

Problems solved by technology

Unfortunately, this kind of receiver structure greatly reduces the sensitivity of the system while achieving low power consumption, so that they cannot meet the sensitivity requirements in practical applications; and if you want to improve the sensitivity of the system, you must increase the The intensity of signal amplification in the RF domain inevitably increases power consumption

Therefore, this kind of receiver has no practical significance.

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