This paper presents a voltage mode cascadable single active element tunable first-order all-pass filter with a single passive component. The active element used to realise the filter is a new building block termed as differential difference dual-X current conveyor with a buffered output (DD-DXCCII). The filter is thus realized with the help of a DD-DXCCII, a capacitor, and a MOS transistor. By ...

We examine the wettability of rough surfaces through a measurement approach that harnesses a wrinkling instability to produce model substrate topographies. Specifically, we probe the wetting of liquids on anisotropic micro-wrinkled features that exhibit well-defined aspect ratios (amplitude versus wavelength of the wrinkles) that can be actively tuned. Our study provides new insight into the we...

This paper proposes two techniques for improving the linearity and power efficiency of switched-capacitor (SC) circuits. The first is a high-speed switched-current-assisting (SCA) path that helps the main (folded-cascode) OTA to deliver most of the desired charge to the integration capacitor, leaving the final error correction to be completed by the main OTA. The second is a pre-charging (PC) p...

This paper presents a micro electrostatic vibration-to-electricity energy converter based on the micro-electromechanical system. For the 3.3 V supply voltage and 1 cm chip area constraints, optimal design parameters were found from theoretical calculation and Simulink simulation. In the current design, the output power is 200 lW/cm for the optimal load of 8 MW. The device was fabricated in a si...

this paper presents a comprehensive case study on electro-mechanical analysis of mems[1] variable capacitors. using the fundamental mechanical and electrical equations, static and dynamic behaviors of the device are studied. the analysis is done for three different modes, namely: dc (static mode), small signal ac and large signal regime. a complete set of equations defining dynamic behavior of ...

This paper presents a new fabrication technology and the associated design parameters for realizing compact and widely-tunable cavity filters with a high unloaded quality factor ( Qu) maintained throughout the analog tuning range. This all-silicon technology has been successfully employed to demonstrate tunable resonators in mobile form factors in the C, X, Ku, and K bands with simultaneous hig...

This paper describes the Q enhancement of inductor or resonance circuit based on the controlled CMOS transonductance, which is applicable to either on-chip inductor or off-chip inductor. The proposed circuit configuration of high Q enhancement is evaluated for the RF transmit filter of a LTE mobile comm’s micro base station, with the Q factor of over 3000 and the capacity of 10W. A tunable filt...