US 12,170,537 B2
Radio frequency receiver circuit
Philip Eugene Quinlan, Glounthaune (IE); Joana Rochelle Ortiz Maramba, Puting Kahoy (PH); Catherine Francisco Andaya, Metro Manila (PH); Erwin Paul Ramos Santiago, Las Pinas (PH); Vernon H. Valles, Karangalan Village (PH); and Juan Miguel Judit Ugsimar, Las Pinas (PH)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Apr. 27, 2023, as Appl. No. 18/140,419.
Application 18/140,419 is a continuation of application No. 17/357,699, filed on Jun. 24, 2021, granted, now 11,750,235.
Prior Publication US 2023/0268949 A1, Aug. 24, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 1/16 (2006.01); H04B 1/18 (2006.01); H04B 1/30 (2006.01)
CPC H04B 1/1607 (2013.01) [H04B 1/18 (2013.01); H04B 2001/307 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wake-up receiver comprising:
a sub-sampler configured to:
receive a radio frequency, RF, signal at any of a plurality of RF frequencies;
receive from a local oscillator a first oscillating signal having a first oscillator frequency; and
sub-sample, using the first oscillating signal, the received RF signal in order to generate and output a sub-sampled signal;
a signal processing system coupled to an output of the sub-sampler and configured to:
receive the sub-sampled signal from the output of the sub-sampler;
demodulate the sub-sampled signal; and
recover from the demodulated sub-sampled signal a digital code that is encoded within the RF signal; and
a wake-up assertion entity configured to:
compare the digital code to one or more predetermined wake-up codes; and
when the digital code matches any of the one or more wake-up codes, output a wake-up assertion signal.