ASIC interface applied to capacitive grating angular displacement sensor

• Main Authors: YI LUYING, JU CHUNGE, ZHOU BIN, HOU BO, LI XIANG, ZHANG RONG, WEI QI
• Format: Patent
• Language: Chinese; English
• Published: 19.07.2019
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PHYSICS; TESTING

The invention relates to an ASIC interface applied to a capacitive grating angular displacement sensor. The ASIC interface comprises a direct current capacitance compensation array, a C-V converter, aresonator, a quantizer, a capacitance feedback array under the control of a digital signal, and a digital demodulation filtering module; the direct current capacitance compensation array is used forcounteracting a direct current amount C0 in a capacitor; the C-V converter is used for converting a detection capacitance signal into a proportionable voltage signal via C-V conversion; the resonatoris used for performing band-pass sigma-delta modulation on a voltage signal output by the C-V converter; the quantizer is used for converting a signal output by the resonator into a bit stream signal;the capacitance feedback array under the control of the digital signal is used for adjusting the dynamic range of the input signal of the C-V converter according to the bit stream signal output by the quantizer; and the digital