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A design methodology and equations are described for lumped-element filter prototypes having low-pass, high-pass, bandpass, or bandstop characteristics with theoretically perfect input- and output-match at all frequencies. Such filters are a useful building block in a wide variety of systems in which the highly reactive out-of-band termination presented by a conventional filter is undesirable. The...
A new current-controlled current-mode universal filter with three inputs and single output employing two translinear current conveyor and two grounded capacitors is presented. The proposed circuit provides low-pass, band-pass, high-pass, bandstop and all-pass current responses from the same configuration at a high impedance terminal. The filter also offers independent electronic control of the natural...
A 4th order Chebyshev complex filter with stop band zeros at the DC point for low-IF receivers' applications using 0.18μm CMOS technology is proposed in this paper. Based on capacitor-OTA integrators, the designed ladder filter uses resistors instead of capacitors to realize the transmission zeros. The complex filter has a 0 to 48dB tunable gain (6dB per step) and over 65dB DC-offset rejection. A...
A new current-mode current-controlled single-input multiple-output universal filter, which employing only three translinear current conveyors and two grounded capacitors. The proposed configuration provides lowpass, bandpass, highpass, bandstop and allpass current responses at a high output impedance terminal, which enable easy cascadability of the circuit. The circuit parameters natural frequency...
In this paper we present different types of active filters designed using analog current-starved pseudo floating-gate (CSPFG) inverters. We show how we can design all types of filters (low pass, high pass, band pass and band reject) using only a combination of capacitors and CSPFG inverters, resulting in area-saving circuits suited for VLSI and ULSI circuit design. The corner frequencies of these...
This paper introduces a current-mode universal biquadratic filter using current controlled current differencing buffered amplifiers (CCCDBAs). The filter circuit is constructed with two CCCDBAs, two current controlled current differencing amplifiers (CCCDAs) and two grounded capacitors. The circuit can realize low-pass, band-pass, high-pass, band-stop and all-pass transfer functions by choosing appropriate...
This article presents a current-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on multiple-output current controlled current conveyor transconductance amplifiers (MO-CCCCTAs). The features of the circuit are that: the quality factor and pole frequency can be tuned orthogonally via the input bias currents: the circuit description is very simple, consisting of merely...
A configurable sigma-delta (SigmaDelta) modulator for sensor-conditioning applications is presented. The architecture allows the configuration of low-pass and band-pass modulators of different orders and topologies. The gains in all the stages are programmable permitting the adaptability of the circuit to different input signals and, therefore, facilitating the evaluation of MEMS and sensor prototypes...
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