Realization of CDTA based frequency agile filter

Pandey, Neeta; Pandey, Rajeshwari; Choudhary, Richa; Sayal, Aseem; Tripathi, M. M.

doi:10.1109/ispcc.2013.6663403

Cited by 17 publications

(14 citation statements)

References 11 publications

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“…The system that is suitable for realizing MISO shadow filters has been proposed in [23]. Based on the systems in [20][21][22][23], several shadow filters of agile filters have been proposed based on current-mode approaches [24][25][26][27][28][29][30][31] and voltage-mode approaches [32][33][34][35][36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

0.5 V Multiple-Input Multiple-Output Differential Difference Transconductance Amplifier and Its Applications to Shadow Filter and Oscillator

et al. 2023

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This paper presents new applications of low-voltage and low-power multiple-input multipleoutput differential difference transconductance amplifier (DDTA). The multiple-input bulk-driven MOS transistor (MIBD MOST) technique provides multiple-input of the active device that simplifies the application's topology and reduces its power consumption. The proposed DDTA has been used to realize multiple-input single-output shadow filter. Both voltage-and transimpedance-mode filtering functions can be obtained. The natural frequency and the quality factor of the shadow filter can be independently and electronically controlled using DDTA-based amplifiers. The proposed shadow filter has been modified to work as a shadow oscillator. The condition and frequency of oscillation can be controlled independently and electronically. The DDTA is capable to work with 0.5V supply voltage and consumes 218.2 nW. The applications have been designed and simulated in Cadence using 0.18µm TSMC CMOS technology.INDEX TERMS differential difference transconductance amplifier (DDTA), shadow filter, shadow oscillator, analog filter, low-voltage, low-power CMOS

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Section: Introductionmentioning

confidence: 99%

0.5 V Multiple-Input Multiple-Output Differential Difference Transconductance Amplifier and Its Applications to Shadow Filter and Oscillator

et al. 2023

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“…There are many shadow filters (also known as frequency-agile filters) realized using variant active elements available in the literature [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. In [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], current-mode (CM) shadow filters have been reported whereas in [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ] voltage-mode (VM) shadow filters have been introduced. This paper is focused on the VM filters which offer high-input and low-output impedances, electronic tuning ability, and use grounded passive components.…”

Section: Introductionmentioning

confidence: 99%

Shadow Filters Using Multiple-Input Differential Difference Transconductance Amplifiers

Kumngern

Khateb

Kulej

2023

Sensors

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This paper presents new voltage-mode shadow filters employing a low-power multiple-input differential difference transconductance amplifier (MI-DDTA). This device provides multiple-input voltage-mode arithmetic operation capability, electronic tuning ability, high-input and low-output impedances. Therefore, the proposed shadow filters offer circuit simplicity, minimum number of active and passive elements, electronic control of the natural frequency and the quality factor, and high-input and low-output impedances. The proposed MI-DDTA can work with supply voltage of ±0.5 V and consumes 9.94 μW of power. The MI-DDTA and shadow filters have been designed and simulated with the SPICE program using 0.18 μm CMOS process parameters to validate the functionality and workability of the new circuits.

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“…A large diversity of SIMO filters are reported [1][2][3][4]. Filter topologies [1][2][3][4] are non-shadow (NS) type, while filter topologies [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] are shadow (S) type. Further, [29][30][31][32][33][34][35] are current-mode (CM) types and [36][37][38][39][40][41][42][43] are voltage-mode (VM) types.…”

Section: Introductionmentioning

confidence: 99%

Improved Current Mode Biquadratic Shadow Universal Filte

2022

Informacije MIDEM

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In this paper, an improved single-input-multiple-output (SIMO) current-mode biquadratic shadow universal filter (SUF) is realized using two new variants of second-generation current conveyors (CCIIs), namely current conveyor cascaded transconductance amplifier (CCCTA) and extra-X current controlled conveyor transconductance amplifier (EX-CCCTA). The low pass and the band pass outputs of a non-shadow universal filter (NSUF), consisting of CCCTA, are utilized through two amplifiers' feedback paths using one EX-CCCTA to realize the proposed SUF. It is resistorless and utilizes only two grounded capacitors. All the five standard responses of SUF, such as low pass (LP), high pass (HP), band pass (BP), band-reject (BR), and all pass (AP), are obtained simultaneously. The main advantage of SUF over NSUF is the ease of orthogonal tuning of the pole frequency (ω o ) and quality factor (Q o ) with the bias currents of CCCTA and EX-CCCTA. It is suitable for full cascadability because of proper input and output impedances. Moreover, it simplifies integrated circuit implementation because all capacitors are grounded and no resistors are required. It does not possess any component matching constraints and consumes 4.1mW of power. The theoretical results have been validated in TSMC 180nm technology using Cadence Virtuoso.

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Realization of CDTA based frequency agile filter

Cited by 17 publications

References 11 publications

0.5 V Multiple-Input Multiple-Output Differential Difference Transconductance Amplifier and Its Applications to Shadow Filter and Oscillator

0.5 V Multiple-Input Multiple-Output Differential Difference Transconductance Amplifier and Its Applications to Shadow Filter and Oscillator

Shadow Filters Using Multiple-Input Differential Difference Transconductance Amplifiers

Improved Current Mode Biquadratic Shadow Universal Filte

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