Brief communication Active-R realization of current-mode highpass filters

Abstract

Active-R realization of current-mode highpass filters MASAMI HIGASHIMURAt Active-R filters have received much attention due to their potential advantages in terms of miniaturization, ease of design and high frequency performance. A realization of current-mode highpass transfer functions using the operational amplifier (op.-amp.) pole is proposed. Since the circuit is composed of only op.-amps and resistances, it is suitable for high frequency operation and monolithic IC implementation.

Single-input Multiple-output Signals Third-order Active-R Filter for different Circuit Merit Factor (Q)

“…The circuit is realized using single pole (as "integrator") behavior of an internally compensated operational amplifier [1,2,[3][4][5]. The filter without the capacitor is called an active-R filter and has received much attention due to its potential advantages in term of miniaturization, ease of design and high frequency performance [6].It has been also pointed out in the literature that active-R networks offer substantially low sensitivity characteristics as compared to RC active structures (Soderstand & Mitra1971).This paper proposes realization and design method for Single-input Multiple-output Thirdorder Active-R Filter for different Circuit Merit Factor Q . This filter circuit gives three filter functions low pass, high pass and band pass, with ideal gain roll-off and high pass-band gain.…”

A versatile current-mode biquad using operational amplifiers

“…Recently, many circuits for realizing current-mode transfer function using active devices have been reported [1][2][3][4][5][6][7][8][9][10][11]. Current-mode circuits have the potential advantages of inherent wide bandwidth, wide dynamic range, low power dissipation and simple circuitry over the voltage-mode counterparts.…”