Analog quantity output circuit and card

• Main Authors: WANG JIAN, MA GUIFENG, YAN ZIXIAO, YU XIAO, DU BAIWAN, DING JUAN, YAN ZHUOMIN
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2024
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The embodiment of the invention discloses an analog quantity output circuit and a card, and the circuit comprises a micro control unit (MCU) which is set to send an instruction and receive feedback information about the instruction; the instruction and the feedback information are digital signals; the DAC chip is set to convert the digital signal sent by the MCU into an analog signal and send the analog signal to external HART equipment connected with the MCU; and the HART modem is set to perform HART communication with the HART equipment, acquire the HART signal returned by the HART equipment, modulate and demodulate the HART signal, acquire feedback information and send the feedback information to the MCU. Through the scheme of the embodiment, the complexity of a circuit and software is reduced, and the circuit reliability is improved. 本申请实施例公开了一种模拟量输出电路和卡件，该电路包括微控制单元MCU，设置为发送指令并接收关于该指令的反馈信息；该指令和反馈信息均为数字信号；数字模拟转换器DAC芯片，设置为将MCU发送的数字信号转化为模拟信号，并将模拟信号发送给所连接的外部的HART设备；HART调制解调器，设置为与HART设备进行HART通讯，获取HART设备回传的HART