OFFSET COMPENSATION CIRCUIT IN LOW VOLTAGE DIFFERENTIAL SIGNALING RECEIVER, LOW VOLTAGE DIFFERENTIAL SIGNALING RECEIVER WITH THE CIRCUIT, AND OFFSET COMPENSATION METHOD OF THE RECEIVER

摘要

The present invention is a low voltage differential signaling (LVDS) receiver implemented using a low temperature polycrystalline silicon thin film transistor (LTPS TFT) using a low temperature polycrystalline silicon process, a threshold voltage that is a problem in the implementation of the LTPS TFT in the circuit implementation of the LTPS TFT An offset compensation circuit for compensating offset due to uneven distribution of and mobility, a low voltage differential signal receiver having the compensation circuit, and a low voltage differential signal receiver offset compensation method are provided. The offset compensation circuit of the present invention is connected in parallel to the differential input terminal of the low voltage differential signal receiver, and varies the W (gate width) / L (gate length) ratio of the transistor according to the output signal of the low voltage differential signal receiver, thereby performing the differential. And a variable transistor circuit for adjusting the amount of current supplied to the input terminal side to compensate for the offset voltage of the differential input terminal. Therefore, the present invention can compensate for the offset at a high speed as compared with the conventional method of storing the threshold voltage in the capacitor, and can achieve a low power consumption and a small area.;LVDS Receiver, Offset Compensation, Successive Approximation Algorithm, LTPS TFT