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CMOS switched-current biquadratic filters
IEEE International Symposium on Circuits and Systems, 2002It is shown how the technique of switched currents (SI) can be used to realize the universal biquadratic transfer function. SI filters require only a standard digital CMOS process, and the power-supply voltage requirement is very low. SI circuits also can be potentially operated at much higher frequencies than switched-capacitor (SC) filters due to the
T.S. Fiez, B. Lee, D.J. Allstot
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STAR: An active biquadratic filter section
IEEE Transactions on Circuits and Systems, 1975This paper describes a thin-film hybrid integrated circuit (HIC) which is specifically manufactured to realize cascadable biquadratic active RC filter sections. The HIC consists of an RC network with one operational amplifier. This network is interconnected by a printed wiring board to realize Friend's Single Amplifier Biquad (SAB) and other filter ...
J. Friend, C. Harris, D. Hilberman
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A Voltage-Mode Universal Biquadratic Filter Using DDCCTA
Journal of Circuits, Systems and Computers, 2016This paper presents a new voltage-mode (VM) universal biquadratic filter using differential difference current conveyor transconductance amplifier (DDCCTA) as an active element. The circuit employs one DDCCTA, two floating resistors and two floating capacitors which can realize five biquadratic filters, namely low-pass (LP), band-pass (BP), band-stop (
Punnavich Phatsornsiri +2 more
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On the design of low-sensitive BOTA-C biquadratic filter
10th IEEE International Conference on Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003, 2004The effects of the balanced output transconductor (BOTA) parasitic elements on second-order filter parameters are studied. New expressions are used to evaluate the shifts in the center frequency and the quality factor of a recently reported mixed-mode filter, based on the balanced output transconductor.
Soliman Awad Mahmoud, Inas A. Awad
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Current‐mode biquadratic filter using DO‐CCCDBAs
International Journal of Circuit Theory and Applications, 2008AbstractThis paper presents a current‐mode universal biquadratic filter performing three functions; low pass, high pass and band pass, based on dual‐output current‐controlled current differencing buffered amplifiers (DO‐CCCDBAs). The features of the circuit are that the quality factor and pole frequency can be tuned independently via the input bias ...
Montree Siripruchyanun, Winai Jaikla
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The analytical design of biquadratic parametric filters
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings, 2002Quadratic and biquadratic filter sections are often used in audio applications since only moderate filter Q's are required. Closed-form expressions for analog biquadratic bandpass filters meeting prescribed specifications are derived. These results are then extended to the discrete-time domain through the use of the bilinear transformation.
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Sensitivity and frequency limitations of biquadratic active filters
IEEE Transactions on Circuits and Systems, 1975A comparative study of single-amplifier filters, fifteen different two-amplifier circuits, and the state-variable three-amplifier configuration is given. The figures-of-merit used are the passive sensitivities, the \omega_0 gain-sensitivity products, the Q gain-sensitivity products, and the \omega_0 and Q deviations due to the amplifiers' limited ...
A. Sedra, J. Espinoza
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1991
In this chapter, we will consider a number of interesting circuits associated with biquadratic functions. Initially, the R-C type will be discussed and the analysis conducted using an approach resembling that used for analogue computing circuitry. It should be pointed out here that some authors prefer to use state-space methods of analysis for these ...
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In this chapter, we will consider a number of interesting circuits associated with biquadratic functions. Initially, the R-C type will be discussed and the analysis conducted using an approach resembling that used for analogue computing circuitry. It should be pointed out here that some authors prefer to use state-space methods of analysis for these ...
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Allpass biquadratic switched-capacitor filters
IEEE Transactions on Circuits and Systems, 1985Biquadratic allpass filters are of great importance for performing phase equalization in highly selective filters such as those employed in modems or other telecommunications equipment. This paper develops and examines topologies for implementing the switched-capacitor (SC) allpass biquad including all of the sampled data effects in the design ...
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Microwave, biquadratic, active-RC filter development
International Journal of RF and Microwave Computer-Aided Engineering, 1998We present a number of computer-simulated results for a recently developed family of active-RC, microwave, biquadratic filters. These circuits are gyrator-based and contain negative second-generation current conveyors (CCII−s) realized as cascades of MMIC GaAs FETs. First, the circuit family is extended to include asymmetric band-reject filters.
Stephen E. Sussman-Fort +2 more
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