Low-noise short-offset transient electromagnetic receiving conditioning circuit and receiver

A receiver, comprising:

• a low-noise short-offset transient electromagnetic receiving signal conditioning circuit, a main control board, a connection board, an interface board, and an analog board;
• wherein the low-noise short-offset transient electromagnetic receiving signal conditioning circuit is disposed on the analog board;
• the connection board comprises a magnetic coupling isolation module, the magnetic coupling isolation module is connected to digital signal ports of the analog board and the main control board, respectively;
• the main control board comprises a multi-processor system-on-chip (MPSoC) as a main control chip, the MPSoC comprises an ARM portion and an FPGA portion, the FPGA portion is configured to control the analog board to perform analog-to-digital conversion, receive and parse converted data, receive and parse GPS data, calibrate a temperature-compensated crystal oscillator, and manage system power functions;
• the ARM portion is configured to perform overall acquisition station process control, human-machine interaction, and data storage;
• the ARM portion communicates with the FPGA portion via an internal AXI bus of the MPSoC, and is configured to configure acquisition parameters and control acquisition start and stop by reading from and writing to FPGA registers;
• analog-to-digital conversion data parsed by the FPGA portion is transmitted in a data stream form to the ARM portion, and the ARM portion stores the data to an external hard disk;
• the analog board comprises an analog-to-digital conversion circuit;
• the analog-to-digital conversion circuit is connected via the connection board to the MPSoC on the main control board;
• the interface board integrates a magnetic field sensor interface;
• the magnetic field sensor interface is connected to an analog channel input end of the analog board;
• and
• the low-noise short-offset transient electromagnetic receiving signal conditioning circuit comprises:
• a first power supply filtering circuit, a second power supply filtering circuit, an active filtering circuit, a power frequency noise suppression circuit, and a low-noise amplification circuit;
• wherein the first power supply filtering circuit and the second power supply filtering circuit are configured to filter a first power supply and a second power supply, respectively, to reduce noise;
• the active filtering circuit is configured to filter out interference signals;
• the power frequency noise suppression circuit is configured to filter out power frequency noise;
• and
• the low-noise amplification circuit comprises:
• an input-stage amplification circuit, a middle-stage amplification circuit, and an output-stage amplification circuit.