Transmitter Power Supply and Isolation.Isolated Current / Voltage Converters

摘要

The present invention is to use the electronic circuit card to reduce the power consumption, improve the reliability of the circuit operation, convenient for maintenance in order to solve the various problems of the conventional transmitter power supply and isolation and non-isolated current / voltage converter It is to make it possible.;The present invention provides a first, second and third DC / DC converter for converting a DC voltage into a DC voltage, a power supply for receiving a DC power supply to the three DC / DC converter, and the first DC / A transmitter power supply unit which receives power from a DC converter and boosts the voltage required by the transmitter to supply power to the transmitter, a current-voltage detector for detecting a current flowing from the transmitter as a voltage, and the current-voltage detector And an isolation amplifier and a non-isolating amplifier for amplifying the detected voltage to generate a 10V output voltage at 0V, and a transmitter output signal line open detection circuit for detecting disconnection of the output signal line of the transmitter.