Current differencing transconductance amplifier (CDTA) with enhanced performance and its application

Kumar, Shireesh; Gupta, Maneesha

doi:10.1007/s10470-015-0675-z

Cited by 18 publications

(9 citation statements)

References 15 publications

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“…Several advanced active devices with a various number of terminals and various principles of controllability have been developed in recent years [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Recently proposed active devices are compared in Table 2.…”

Section: Discussionmentioning

confidence: 99%

A CMOS Multiplied Input Differential Difference Amplifier: A New Active Device and Its Applications

et al. 2017

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This paper presents a newly developed active device, referred to as a multiplied input differential difference amplifier (MIDDA), which allows operations of summation/subtraction and multiplication of input signals. It was designed and fabricated using I3T25 0.35 µm ON (ON Semiconductor, Phoenix, AZ, USA) Semiconductor technology. The achieved results, which describe the experimentally verified behaviour of the fabricated device, are introduced, as well as the simple applications of MIDDA with electronically controllable parameters, useful for analogue signal processing. Moreover, the paper discusses an interesting example of nonlinear application to a double-sideband amplitude modulator, based on the utilization of multiplication and summation of particular signals. The laboratory experimental results which are achieved through the use of a fabricated prototype (both in time and frequency domain), confirm the workability of the concept.

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Section: Discussionmentioning

confidence: 99%

A CMOS Multiplied Input Differential Difference Amplifier: A New Active Device and Its Applications

et al. 2017

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“…Fig. 5 illustrates a simple macro‐model of a SISO‐OTA [3, 18, 19], whereas Fig. 6 presents a macro model of a CDS.…”

Section: Current‐mode Active Devicesmentioning

confidence: 99%

“…The analyses and simulation experiments presented in [20, 21] showed some interesting properties of the CDTA structure [19] and pointed out some possible further modifications. The one that is the most interesting in the authors' opinion is the extension of the input stage with a floating voltage input [21].…”

Section: Modified Current Differencing Transconductance Amplifiermentioning

confidence: 99%

“…7 b ) can be represented by the following matrix (3a):

(][, \begin{matrix} 1em4pt \\ \begin{matrix} 1em4pt \\ i_{y} \\ v_{p} \end{matrix} \\ \begin{matrix} 1em4pt \\ v_{n} \\ i_{z} \end{matrix} \\ i_{x} \end{matrix}) = (][, \begin{matrix} 1em4pt \\ \begin{matrix} 1em4pt \\ 0 & 0 & 0 \\ 1 & R_{p} & 0 \\ 1 & 0 & R_{n} \end{matrix} & \begin{matrix} 1em4pt \\ 0 \\ 0 \\ 0 \end{matrix} & \begin{matrix} 1em4pt \\ 0 \\ 0 \\ 0 \end{matrix} \\ \begin{matrix} 1em4pt \\ 0 & 1 & - 1 \end{matrix} & 0 & 0 \\ \begin{matrix} 1em4pt \\ 0 & 0 & 0 \end{matrix} & \pm g_{m} & 0 \end{matrix}) \cdot (][, \begin{matrix} 1em4pt \\ \begin{matrix} 1em4pt \\ v_{y} \\ i_{p} \end{matrix} \\ i_{n} \\ \begin{matrix} 1em4pt \\ v_{z} \\ v_{x} \end{matrix} \end{matrix})

An ideal MCDTA is a very versatile circuit. It offers a great degree of flexibility and can be easily transformed (configured) into other known functional blocks, namely: Into a basic CDTA – by grounding terminal y . Into a CCTA – by leaving terminal n open. Into a CFTA – by grounding terminal y and leaving terminal p open. Into a current operational amplifier – by grounding terminal y and leaving terminal z open etc. In many publications on current‐mode devices, the authors analyse their circuits and idealise certain parameters, and in the case of CDTA circuits [19] the input resistances R p and R n are often neglected (i.e. assumed to be equal to 0).…”

Section: Modified Current Differencing Transconductance Amplifiermentioning

confidence: 99%

“…7 b ). The authors of many papers [12, 19] assume that the input resistances of a CDS, namely the R p and R n , have such small values that they can be neglected. In the presented approach the R p and R n are valid parameters of the MCDTA that can be controlled and they are useful in practical applications.…”

Section: Modified Current Differencing Transconductance Amplifiermentioning

confidence: 99%

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