The Resistance Temperature Detector (RTD) signal processing circuit is an important part of the RTD temperature measurement module. In this paper, the RTD processing signal circuit with a dual redundant design is developed, which realizes the high-precision by the symmetrical design of the circuit layout and the precision control of components to ensure the consistency of the two outputs, and the error of the two output voltages is less than 0.36%. Meanwhile, the circuit adopts high-density thick film hybrid integration technology to realize circuit miniaturization. It is verified that the output voltages accuracy of the circuits for mass production is less than 0.19% at room temperature of 25°C, less than 0.39% at high temperature of 125°C, and less than 0.27% at low temperature of -55°C. The size of the circuit is only 14.40mm×14.40mm×3.55mm. This circuit can be widely used in the field of miniaturized and high-precision temperature measurement as a key device of high-reliability and general-purpose RTD temperature measurement module.
The accelerometer servo circuit is one of the important components in the inertial measurement system. Based on the working principle of the quartz flexible accelerometer and the composition of the hybrid integrated quartz flexible accelerometer servo circuit, this paper developed a quartz flexible accelerometer servo circuit with low power consumption and high integration using a linear stabilized power supply servo transconductance/compensation amplifier. The development of this circuit has guiding significance for the development of the traditional quartz flexible accelerometer servo circuit.
As an important part of the optical communication system, the optical module plays a vital role in the field of high-speed data communication. The transmission quality of the signal directly affects the performance of the communication system, and the high-speed signal transmission process will be attenuated, resulting in bit errors. In order to counteract the attenuation of high-speed signals during transmission and reduce the transmission error rate, this paper proposed a signal compensation method based on the HXT6112-VCSEL driver. This method compensated the signal by adjusting the signal transmission characteristics of the configuration of the control registers inside the HXT6112. It was found that after this method, the eye diagram was significantly improved. It can effectively solve the attenuation problem of highspeed signal transmission.
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