High input impedance VM-APSs with grounded passive elements

Maheshwari, Sudhanshu

doi:10.1049/iet-cds:20060196

Cited by 56 publications

(47 citation statements)

References 12 publications

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“…Three of the circuits are canonical and are tunable by simple resistive matching (two equal-valued resistors), whereas the other three non-canonical circuits are tunable through a single resistor. The use of equal-valued resistors or capacitors for all-pass filter realization is a desirable feature of the proposed circuits, when compared with the author's recent work [23]. The utility and validity of the circuits for analog signal processing applications are verified through PSPICE simulations using 0.5 CMOS parameters.…”

Section: Resultsmentioning

confidence: 96%

High input impedance voltage‐mode first‐order all‐pass sections

Maheshwari¹

2007

Circuit Theory & Apps

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SUMMARYThis paper proposes six new first-order voltage-mode all-pass sections (VM-APSs) based on three general topologies. Each circuit uses two differential voltage current conveyors and three grounded passive components. All the circuits possess high input impedance and easy control of pole frequency either by a simple matching of resistors (two equal-valued resistors) for the three canonical circuits or by a single resistor for three non-canonical circuits. PSPICE simulation results using real device 0.5 CMOS parameters are given to validate the proposed circuits.

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Section: Resultsmentioning

confidence: 96%

High input impedance voltage‐mode first‐order all‐pass sections

Maheshwari¹

2007

Circuit Theory & Apps

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“…However, the non-idealities do affect the filter gain as it now depends on β 22 . Similarly, the pole frequency is also affected as it now becomes ω o = αβ 11 /R X C. The sensitivity analysis shows that the sensitivity of the pole frequency to the non-idealities is unity in magnitude, thus ensuring a good sensitivity performance. It is further noted that the voltage and current transfer gains are unity up to high frequencies, determined by the process parameters and the technology used, and thereafter show a first order roll-off.…”

Section: Non-ideal Analysismentioning

confidence: 99%

“…This paper presents a new first order VM-APS which caters to six of the above listed features. The new circuit with two active elements exhibits all the features listed from (ii) to (vii), thus offering a novel and unique addition to the field and to the rich literature on the subject [1,[5][6][7][8][9][10][11][12][13]15]. When compared to the two active element based tunable circuit realizations [9,12], the new circuit is canonical (unlike [12]) and uses a grounded capacitor (unlike [9,12]).…”

Section: Introductionmentioning

confidence: 99%

A Canonical Voltage-Controlled VM-APS with a Grounded Capacitor

Maheshwari¹

2008

Circuits Syst Signal Process

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A new canonical first order voltage-mode all-pass section (VM-APS) employing a single grounded capacitor as the only passive element and two differential voltage current conveyors as the active elements is proposed. The circuit, with its attractive features of resistorless realization, voltage-controlled pole frequency and low impedance voltage output is a novel and unique offering to the field and an addition to the rich literature on the subject. PSPICE simulations are carried out in 0.5 µ CMOS technology to validate the utility of the proposed circuit.

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“…Thus, applications and advantages of various active filter transfer functions that use different active elements have been studied intensively [3][4][5][6][7][8][9][10][11][12]. Depending on the nature of input and output signals, filters are classified as current-mode (CM), voltage-mode (VM), transadmittance-mode (TAM) and transimpedance-mode (TIM) filters.…”

Section: Introductionmentioning

confidence: 99%

Electronically Tunable Current Controlled Current Conveyor Transconductance Amplifier-Based Mixed-Mode Biquadratic Filter with Resistorless and Grounded Capacitors

Chen

Yang

2017

Applied Sciences

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Abstract:A new electronically tunable mixed-mode biquadratic filter with three current controlled current conveyor transconductance amplifiers (CCCCTAs) and two grounded capacitors is proposed. With current input, the filter can realise lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS) and allpass (AP) responses in current mode and LP, BP and HP responses in transimpedance mode. With voltage input, the filter can realise LP, BP, HP, BS and AP responses in voltage and transadmittance modes. Other attractive features of the mixed-mode biquadratic filter are (1) the use of two grounded capacitors, which is ideal for integrated circuit implementation; (2) orthogonal control of the quality factor (Q) and resonance angular frequency (ω o ) for easy electronic tenability; (3) low input impedance and high output impedance for current signals; (4) high input impedance for voltage signal; (5) avoidance of need for component-matching conditions; (6) resistorless and electronically tunable structure; (7) low active and passive sensitivities; and (8) independent control of the voltage transfer gains without affecting the parameters ω o and Q.

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High input impedance VM-APSs with grounded passive elements

Cited by 56 publications

References 12 publications

High input impedance voltage‐mode first‐order all‐pass sections

High input impedance voltage‐mode first‐order all‐pass sections

A Canonical Voltage-Controlled VM-APS with a Grounded Capacitor

Electronically Tunable Current Controlled Current Conveyor Transconductance Amplifier-Based Mixed-Mode Biquadratic Filter with Resistorless and Grounded Capacitors

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