US 11,728,692 B2
Modem design for wireless power transfer
Itay Sherman, Petach Tikva (IL)
Assigned to POWERMAT TECHNOLOGIES LTD., Petah Tikva (IL)
Filed by POWERMAT TECHNOLOGIES LTD., Petach Tikva (IL)
Filed on May 17, 2021, as Appl. No. 17/321,842.
Claims priority of provisional application 63/026,742, filed on May 19, 2020.
Prior Publication US 2021/0367457 A1, Nov. 25, 2021
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02)] 8 Claims
OG exemplary drawing
 
1. A power transmitter executing communication with a power receiver, the power transmitter configured to:
synchronize a sampling start time to a pulse-width modulation (PWM) signal;
determine an average sampling rate for sampling a power carrier signal, wherein the power carrier signal is generated by the PWM signal;
sample the power carrier signal to obtain sample values;
limit an amplitude above or below an average of the sampled values to produce limited sampled values;
send the limited sample values to a 0 match filter and a 1 match filter;
search outputs of the 0 match filter and 1 match filter for peaks;
determine a current modem state; and
process the outputs of the 0 match filter and the 1 match filter based on the determined current modem state.