Universal filter using unity-gain cells

Celma, S.; Sabadell, J.; Martínez, P.A.

doi:10.1049/el:19951269

Cited by 50 publications

(30 citation statements)

References 2 publications

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“…Only the circuits from [1], [6]-[9] realize fixedtopology single-input-multiple-output (SIMO)-type biquads with which this paper is concerned. A survey of the circuits from [1], [6]-[9] reveals that they suffer from one or more of the following drawbacks: (i) non-availability of infinite Z in (ii) non-availbility of tunability of all the parameters [6], [7], [9], and/or (iii) non-availability of all grounded/virtually grounded resistors [1] (three-CFOA-biquad therein), [6] and [9] and/or (iv) requirement of a relatively larger number (five to nine) of CFOAs [1] (five-CFOA-biquad therein), [8], [9].…”

Section: Introductionmentioning

confidence: 99%

CFOA-based state-variable biquad and its high-frequency compensation

Singh

Senani

2005

IEICE Electron. Express

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Abstract:A four-Current feedback operational amplifier (CFOA)-based state variable biquad is described which permits the accommodation of or compensation for the z-pin parasitic impedances of the CFOAsand offers a number of advantages over previously known CFOA-based biquad configurations. The workability of the circuit has been confirmed by SPICE simulation results based on commercially available AD844 type CFOAs.

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Section: Introductionmentioning

confidence: 99%

CFOA-based state-variable biquad and its high-frequency compensation

Singh

Senani

2005

IEICE Electron. Express

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“…A number of such circuits are reported in technical literature, for instance, [7,8,47,63,66,71,72,79,84,88,98,102,105,106,109,111,132,137,144,153,159].…”

Section: Single-input-single-output (Siso)-type Vm Biquadsmentioning

confidence: 99%

“…A number of SISO Cm biquads have been reported by various researchers in literature, for instance, [28,61,67,86,88,98,99,103,109,112,114,116,117,118,154,158,165]. Figure 6.34 shows an exemplary multi-purpose CCII-RC biquad filter homologous to the traditional KHN-op-amp biquad proposed by Sun and Fidler in [28].…”

Section: Single-input-single-output (Siso)-type CM Biquadmentioning

confidence: 99%

First, Second and Higher Order Filter Design Using Current Conveyors

2014

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“…Motivated by these advantages, the use of followers has been explored mainly in the realisation of filters [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], oscillators [21][22][23][24][25][26][27][28] and more recently, in impedance converters [28].…”

Section: Introductionmentioning

confidence: 99%

New Single-Resistance-Controlled Oscillator Configurations Using Unity-Gain Cells

Gupta

Senani

2005

Analog Integr Circ Sig Process

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Unity-gain voltage followers and unity-gain current followers have attracted attention in the recent literature in the context of analog signal processing as well as signal generation because of the advantages of wider bandwidth and low power consumption of these active elements as compared to other more complex building blocks. Motivated by these advantages, followers have been used as alternatives to other more complex building blocks in the realisation of filters, oscillators and more recently, in impedance converters. Although some configurations for realizing sinusoidal oscillators using unity-gain voltage/current followers have been described in the earlier literature, only one of them is a second-order single-resistance-controlled oscillator but requires as many as eight followers. This paper derives, through a state-variable synthesis approach, a number of new follower-based single-resistancecontrolled oscillators requiring a much smaller number (only two to four) of followers. The new circuits are shown to possess a number of other interesting features. The workability of the new structures has been confirmed by SPICE simulation results using CMOS-based followers.

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Universal filter using unity-gain cells

Cited by 50 publications

References 2 publications

CFOA-based state-variable biquad and its high-frequency compensation

CFOA-based state-variable biquad and its high-frequency compensation

First, Second and Higher Order Filter Design Using Current Conveyors

New Single-Resistance-Controlled Oscillator Configurations Using Unity-Gain Cells

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