In this paper, a current-mode Kerwin-Huelsman-Newcomb (KHN) filter structure employing four z-copy current follower transconductance amplifiers (ZC-CFTAs) and two grounded capacitors is proposed. The circuit structure has one low-impedance current input and three high-impedance current outputs and enables realizing lowpass, bandpass and highpass current responses simultaneously. The bandstop an...

This paper proposes the design of a mixed-mode universal biquad configuration, which realizes generic filter functions in all four possible modes, namely voltage mode (VM), current (CM), transadmittance (TAM), and transimpedance (TIM). The architecture employs two differencing buffered amplifiers (VDBAs), resistors capacitors, can provide lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS...

In this paper, a first-of-a-kind mixed-mode universal filter employing three VDBAs and passive components, is proposed. The operates in all four modes provides five responses, namely voltage-mode (VM), current-mode (CM), trans-impedance-mode (TIM), or trans-admittance-mode (TAM). Additionally, the same topology can also work as CM single-input-multi-output (SIMO) filter. A state-of-the-art comp...

In this paper, new configurations of voltagemode biquadratic filters with single input and three outputs are presented. The proposed configurations employ a DDCC (Differential Difference Current Conveyor) variant namely the Unity-Gain Sum Difference Amplifier (UGSDA) and use two operational transconductance amplifiers (OTAs) and two grounded capacitors. The circuits have the following advantage...

This article presents a dual-mode (voltage-mode and current-mode) universal biquadratic filter performing completely standard functions: lowpass, highpass, bandpass, band-reject, and allpass functions, based on plus-type dual-output second-generation, current controlled, current conveyor (DO-CCCII+). The features of the circuit are that the bandwidth and natural frequency can be tuned electroni...

Besl and Jain's variable order surface tting algorithm 1] is a useful method of constructing a noise-free reconstruction of 2 1 2 D range images with a small number of primitive regions. The use of bivariate polynomi-als as the approximation basis functions is linear, fast and easy to render robust. Seeding ts from regions classiied by diierential geometry is an important step towards a viewpoi...

In this paper, very high frequency (VHF) current and voltage biquadratic lowpass filters implemented directly by the linear wideband finite-gain current and voltage amplifiers, respectively, are proposed and analyzed. A new Q-enhancement circuit which consists of a finite-gain wideband tunable voltage amplifier and a Miller capacitor is also proposed. It can increase the maximum-gain frequency ...