A noise-shaping accelerometer interface circuit for two-chip implementation
نویسندگان
چکیده
This paper introduces a new architecture for sensor interface circuits using a delta-sigma modulator. The three-level force feedback allows the use of a digital compensator to stabilize the loop. A 3rd-order delta-sigma structure shapes the opamp noise and allows two-chip implementation with high loop gain at low frequencies.
منابع مشابه
IEEE Instrumentation and Measurement Technology Conference Budapest Hungary May A Noise Shaping Accelerometer Interface Circuit for Two Chip Implementation
A proposed third order noise shaping accelerometer interface circuit enhances the SNR compared with the previ ously presented interface circuits The solution for the two chip implementation is described and a novel cross coupled CDS integrator is proposed This scheme functions even with the large parasitic capacitances between the sensor and the interface circuit The op amp noise is rst order s...
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1 ENZ, c.c., and TEMES, G.C : 'Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization', Proc. IEEE, 1996, 84, pp. 1584-1614 2 KAJITA, T. , MOON, U,-K., and TEMES, G.C.: 'A noise-shaping accelerometer interface circuit for two-chip implementation'. IEEE ISCAS 2000, May 2000, pp. IV-337-IV-340 3 STEENSGAARD, I.: 'Clo...
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