Yeonho Seo, Yurin Jin, Sungmi Kim, Jongyeol Lee, Seongik Cho
Rotary Variable Differential Transformer (RVDT), Sensor, Phase correction, Demodulation, Signal processor, Costas Loop
In this paper, we propose a signal processing circuit using Phase Locking method for phase correction of RVDT sensor. A digital phase correction method using a conventional demodulator has been used to correct the phase using demodulation signals. Therefore, the chip size increases because a ROM table is needed to generate the demodulation signal. Proposed phase correction circuit is performed using a reference signal instead of a demodulation signal for phase correction. The chip size decreases because there is no need to make a demodulation signal. The design is TSMC 0.18um CMOS technology and the supply voltage is 1.8V. The proposed circuit has a 94% reduction in chip size compared to the conventional Costas loop type circuit.
Cite this paper
Yeonho Seo, Yurin Jin, Sungmi Kim, Jongyeol Lee, Seongik Cho. (2017) Small Area Phase Correction Circuit for RVDT Using XOR Phase Detector. International Journal of Signal Processing, 2, 7-10