Capacitive accelerometers with electrostatic force feedback are widely employed, because of performance and robustness. The force feedback acts as a means for electronic modulation of the spring constant of the suspension. Commonly, the electrostatic feedback is employed for null-based acceleration measurement. A suitable electrostatic time-varying actuation could instead be used to make the ac...

A low-voltage CMOS rail-to-rail OpAmp with high slew-rate and fast-settling is presented. The input stage is composed of the complementary differential pairs, a pair of modified current-mode maximum selecting circuits (Maximum Current Selecting Circuit 11) and a class-AB feedback loop circuit. It achieves rail-to-rail operation, constant-gm ,high slewrate and fast-settling. With this OpAmp topo...

We describe a fully differential amplifier for oversampled A/D converter applications. This amplifier employs a single stage telescopic architecture using both N-type and P-type gain-boosting technique with capacitive feedback. This architecture offers extremely high gain, low noise, low power and the need for compensation. But the potential slow-settling problem due to the slow doublet should ...

This paper proposes a wideband common-gate LNA using capacitive feedback. The transconductance of the proposed LNA can be enlarged and noise figure can be improved while the conventional common-gate LNA has to use a smaller transconductance for the input impedance matching. In the experimental results using a 0.18-μm CMOS technology, the gain is 13.4 dB, NF is 2.7 dB, IIP3 is −7 dBm at 0.8GHz, ...

This study presents a two-dimensional micro-/nanoradian angle generator (2D-MNAG) that achieves high angular displacement resolution and repeatability using a piezo-driven flexure hinge for two-dimensional deflections and three capacitive sensors for output angle monitoring and feedback control. The principal error of the capacitive sensor for precision microangle measurement is analyzed and co...

The paper reviews modeling of thyristor–controlled series capacitors (TCSC) which are highly nonlinear systems with continuous and discontinuous states, and proposes three nonlinear controllers for it: (1) An approximate feedback linearization control (FLC) (2) A sliding surface–like design (3) Control in transformed coordinates. Detailed (switched) time– domain simulations are used to verify t...