Current Differencing Cascaded Transconductance Amplifier (CDCTA) and Its Applications on Current-Mode nth-Order Filters

Xu, Jun; Wang, Chunhua

doi:10.1007/s00034-013-9565-8

Cited by 20 publications

(11 citation statements)

References 25 publications

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“…The other advantage of the butterfly-shaped FPAA is the excellent scalability, and it is easy to expand the size of the FPAA by adding CABs in the horizontal and vertical directions of the FPAA. [34,35]:…”

Section: Introductionmentioning

confidence: 98%

“…These modifications make this circuit possess such features as the linearity of the circuit is increased, the output impedance of the circuit is improved, and its supply voltage can low to ±1.5 V, -3 dB bandwidth can achieve about 100 MHz. In 2013, Xu et al [35] proposed a CDCTA, and its supply voltage is ±1.5 V, -3 dB bandwidth is about 200 MHz. However, there are some drawbacks for above these circuits: (a) the bandwidth of those circuits is limited, which is almost \200 MHz.…”

Section: Introductionmentioning

confidence: 99%

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A wideband linear tunable CDTA and its application in field programmable analogue array

Wang

Sun

et al. 2016

Analog Integr Circ Sig Process

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This document is the Accepted Manuscript version of the following article: Hu, Z., Wang, C., Sun, J. et al. ???A wideband linear tunable CDTA and its application in field programmable analogue array???, Analog Integrated Circuits and Signal Processing, Vol. 88 (3): 465-483, September 2016. Under embargo. Embargo end date: 6 June 2017. The final publication is available at Springer via https://link.springer.com/article/10.1007%2Fs10470-016-0772-7 ?? Springer Science+Business Media New York 2016In this paper, a NMOS-based wideband low power and linear tunable transconductance current differencing transconductance amplifier (CDTA) is presented. Based on the NMOS CDTA, a novel simple and easily reconfigurable configurable analogue block (CAB) is designed. Moreover, using the novel CAB, a simple and versatile butterfly-shaped FPAA structure is introduced. The FPAA consists of six identical CABs, and it could realize six order current-mode low pass filter, second order current-mode universal filter, current-mode quadrature oscillator, current-mode multi-phase oscillator and current-mode multiplier for analog signal processing. The Cadence IC Design Tools 5.1.41 post-layout simulation and measurement results are included to confirm the theory

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A wideband linear tunable CDTA and its application in field programmable analogue array

Wang

Sun

et al. 2016

Analog Integr Circ Sig Process

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“…Recently, a current differencing cascaded transconductance amplifier (CDCTA) with n transconductances tuned electronically has been presented by Xu [32]. The CDCTA enjoys the features of simple structure, low input impedance and low power consumption etc.…”

Section: Introductionmentioning

confidence: 99%

Multi-function Current Differencing Cascaded Transconductance Amplifier (MCDCTA) and Its Application to Current-Mode Multiphase Sinusoidal Oscillator

Jin

2015

Wireless Pers Commun

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In this study, a new versatile active element, namely multifunction current differencing cascaded transconductance amplifier (MCDCTA) is proposed. The proposed MCDCTA enjoys the advantages of low voltage, low-input and high-output impedance, wide bandwidth etc., and it simplifies the design of the current-mode analog signal processing circuit greatly, especially the design of high-order filter and oscillator circuits. Moreover, an example, a new current-mode multiphase sinusoidal oscillator (MSO) using the proposed MCDCTA is described in this paper. The proposed MSO consists only one MCDCTA and minimum grounded passive elements, it could provide 2n (n ] 2) output current signals with equally phase difference, and the output current signals are all at high output impedance terminals. The oscillation condition and the oscillation frequency of the MSO could be linearly and electronically adjusted by controlling the bias currents of MCDCTA, and it is suitable for variable frequency oscillator application. The operation of the proposed oscillator has been verified through PSPICE simulation and experimental results.

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“…Recently, a voltage tunable CDTA with high performance and enhanced bandwidth has been proposed in [13]. Apart from the advancement in the structure of CDTA, there are a lot of papers published in the applications such as current limiter [14], filters [15][16][17][18][19], inductance simulation circuits [20], multipliers [21,22], modulators [23], oscillators [24][25][26][27][28][29][30][31], rectifier [32,33] etc. Among the applications cited above, the center frequency (f 0 ) of filters and frequency of oscillation (f 0 ) of oscillators are controlled by the ratio of transconductance (g m ) to capacitor (C) i.e.…”

Section: Introductionmentioning

confidence: 99%

Current differencing transconductance amplifier (CDTA) with high transconductance and its application in filter and oscillator

Kumar

Gupta

2016

Optik

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Current Differencing Cascaded Transconductance Amplifier (CDCTA) and Its Applications on Current-Mode nth-Order Filters

Cited by 20 publications

References 25 publications

A wideband linear tunable CDTA and its application in field programmable analogue array

A wideband linear tunable CDTA and its application in field programmable analogue array

Multi-function Current Differencing Cascaded Transconductance Amplifier (MCDCTA) and Its Application to Current-Mode Multiphase Sinusoidal Oscillator

Current differencing transconductance amplifier (CDTA) with high transconductance and its application in filter and oscillator

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