US 11,837,996 B2
Phase demodulator with negative feedback loop
Jang Hong Choi, Daejeon (KR); Bon Tae Koo, Daejeon (KR); Kyung Hwan Park, Daejeon (KR); Min Park, Daejeon (KR); and Seon-Ho Han, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Jan. 26, 2022, as Appl. No. 17/585,009.
Claims priority of application No. 10-2021-0034206 (KR), filed on Mar. 16, 2021.
Prior Publication US 2022/0302909 A1, Sep. 22, 2022
Int. Cl. H03D 3/24 (2006.01); H03F 3/04 (2006.01); H04L 27/22 (2006.01); H03D 7/00 (2006.01); H03D 3/02 (2006.01); G01S 7/35 (2006.01); H03K 5/00 (2006.01)
CPC H03D 3/247 (2013.01) [H03D 3/02 (2013.01); H03D 7/00 (2013.01); H03F 3/04 (2013.01); H04L 27/22 (2013.01); G01S 7/354 (2013.01); G01S 7/358 (2021.05); H03K 2005/00078 (2013.01); H03K 2005/00286 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A system comprising a phase demodulator, the system comprising:
a transmitter configured to output a reference signal to a target;
a receiver configured to receive a target signal generated in response to the reference signal from the target; and
a demodulation processor configured to demodulate the target signal,
wherein the demodulation processor includes:
a phase controller configured to output a phase signal based on the reference signal and to control a phase of the phase signal based on a magnitude a feedback signal and a phase threshold value;
a phase shifter configured to delay a phase of the phase signal to output a delay signal;
a mixer configured to output a mixing signal based on the target signal and the delay signal; and
an amplifier configured to produce the feedback signal by amplifying the mixing signal.