US 12,481,270 B2
Hart circuit and method for determining the state of a field interface thereof
Min Xu, Shanghai (CN); Gang Du, Shanghai (CN); Jianjun Chen, Shanghai (CN); and Chunhui Zhang, Shanghai (CN)
Assigned to SHANGHAI CHENZHU INSTRUMENT CO., LTD., Shanghai (CN)
Appl. No. 18/276,132
Filed by SHANGHAI CHENZHU INSTRUMENT CO., LTD., Shanghai (CN)
PCT Filed Jun. 17, 2022, PCT No. PCT/CN2022/099323
§ 371(c)(1), (2) Date Aug. 7, 2023,
PCT Pub. No. WO2023/216362, PCT Pub. Date Nov. 16, 2023.
Claims priority of application No. 202210511096.2 (CN), filed on May 11, 2022.
Prior Publication US 2025/0004453 A1, Jan. 2, 2025
Int. Cl. G05B 19/418 (2006.01); H02M 1/00 (2007.01); H02M 3/00 (2006.01); H02M 3/335 (2006.01)
CPC G05B 19/4186 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0012 (2021.05); H02M 3/003 (2021.05); H02M 3/335 (2013.01); G05B 2219/24015 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A Highway Addressable Remote Transducer (HART) circuit, comprising:
a control interface, an adjustable power supply module, a first HART module, an isolation module, and a field interface;
wherein the first HART module is connected to the control interface, and the first HART module is configured to generate a first control signal when receiving a first inquiry signal inputted from the control interface;
wherein the adjustable power supply module is connected to the control interface and the first HART module, and the adjustable power supply module is configured to output a first power signal to the control interface and, and in response to the first control signal, modulate the first power signal into a first HART signal;
wherein a first terminal of the isolation module is connected to the control interface, and the isolation module is configured to isolate a signal from the first terminal of the isolation module to generate an isolated signal and couple the isolated signal to a second terminal of the isolation module; and
wherein the field interface is connected to the second terminal of the isolation module.