# US 12,009,954 B2 · Device and method for decoding data from wireless signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,954 B2 - Document ID: US12009954B2 - Status: Granted - Kind: B2 - Application number: 17/538,803 - Filed: 2021-11-30 - Published: 2023-06-08 - Granted: 2024-06-11 - Earliest claimed: 2021-11-30 - Assignees: STMicroelectronics S.r.l. - Applicants: Stmicroelectronics, Inc. - Inventors: Andrea Lorenzo Vitali - Web page: https://patentgrep.com/patent/US12009954B2 ## CPC - H04L 27/06: Demodulator circuits; Receiver circuits - H02J 50/12: of the resonant type - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H04L 25/4904: {using self-synchronising codes, e.g. split-phase codes} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract An electronic device receives wireless signals encoded with data in an amplitude-shift keying format. The electronic device passes the wireless signals through a low-pass filter. The low-pass filter has a cutoff frequency between a first frequency associated with data values of a first type and a second frequency associated with data values of a second type. The low-pass filter has the effect of changing the wireless signal from the amplitude-shift keying format to an on-off keying format without losing the data. The electronic device decodes the data from the wireless signal in the on-off keying format. ## Claims ### Claim 1 A method, comprising: receiving, with a first electronic device, a carrier signal transmitted from a second electronic device and including data encoded with an amplitude-shift keying scheme; generating, from the carrier signal with the first electronic device, an on-off keying signal by passing the carrier signal through a low-pass filter; and decoding, with the first electronic device, the data from the on-off keying signal. ### Claim 2 (depends on 1) The method of claim 1, wherein in the on-off keying signal binary 0s are represented by non-zero amplitudes and binary 1s are represented by substantially zero amplitudes. ### Claim 3 (depends on 1) The method of claim 1, wherein the amplitude-shift keying scheme is a differential Manchester scheme. ### Claim 4 (depends on 3) The method of claim 3, wherein in the amplitude-shift keying scheme binary 1s have shorter feature lengths than binary 0s. ### Claim 5 (depends on 1) The method of claim 1, further comprising harvesting energy from the carrier signal with the first electronic device. ### Claim 6 (depends on 5) The method of claim 5, further comprising: generating a charging current by harvesting energy from the carrier signal; and charging a battery of the first electronic device with the charging current. ### Claim 7 (depends on 1) The method of claim 1, wherein the carrier signal is a Qi protocol carrier signal. ### Claim 8 (depends on 1) The method of claim 1, wherein the carrier signal is a near field communication signal. ### Claim 9 (depends on 1) The method of claim 1, further comprising passing the carrier signal through the amplitude-shift keying scheme of the first electronic device prior to passing the carrier signal through the low-pass filter. ### Claim 10 (depends on 1) The method of claim 1, wherein the low-pass filter has a cutoff frequency greater than a first frequency associated with data values of a first type in the carrier signal and lower than a second frequency associated with data values of a second type in the carrier signal. ### Claim 11 (depends on 10) The method of claim 10, wherein the first type is 0s and the second type is 1s. ### Claim 12 An electronic device, comprising: an antenna configured to receive, from a transmitting electronic device, a carrier signal including data encoded with an amplitude-shift keying scheme; a low-pass filter configured to receive the carrier signal and to generate an on-off keying signal from the carrier signal; and a controller configured to decode the data from the on-off keying signal. ### Claim 13 (depends on 12) The electronic device of claim 12, further comprising energy harvesting circuitry coupled to the antenna and configured to harvest energy from the carrier signal. ### Claim 14 (depends on 13) The electronic device of claim 13, further comprising a battery coupled to the energy harvesting circuitry, wherein the energy harvesting circuitry generates a charging current from the carrier signal and supplies the charging current to the battery. ### Claim 15 (depends on 12) The electronic device of claim 12, wherein the amplitude-shift keying scheme is a differential Manchester scheme. ### Claim 16 (depends on 15) The electronic device of claim 15, wherein in the amplitude-shift keying scheme binary 1s have shorter feature lengths than binary 0s. ### Claim 17 (depends on 12) The electronic device of claim 12, wherein the carrier signal is a Qi standard carrier signal. ### Claim 18 A method, comprising: receiving, with an electronic device, a carrier signal encoded with data; harvesting energy from the carrier signal with the electronic device; passing the carrier signal through a low-pass filter having a cutoff frequency between a first frequency associated with data values of a first type and a second frequency associated with data values of a second type; and decoding the data from the carrier signal after passing the carrier signal through the low-pass filter. ### Claim 19 (depends on 18) The method of claim 18, wherein the carrier signal is encoded with data in an amplitude-shift keying format. ### Claim 20 (depends on 19) The method of claim 19, further comprising: converting the carrier signal from the amplitude-shift keying format to an on-off keying format by passing the carrier signal through the low-pass filter; and decoding the data from the carrier signal in the on-off keying format.