## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline  & **Design Target** & \begin{tabular}{c} **Simple Single** \\ **(Both = Integrator** \\ **and Differentiator**) \\ \end{tabular} & \begin{tabular}{c} **Active** \\ **Parameter Electronic** \\ **Time Constant** \\ **Timing** \\ \end{tabular} & \begin{tabular}{c} **Active** \\ **Devices** \\ **Functional-Order** \\ **Tuning** \\ \end{tabular} & \begin{tabular}{c} **Topological** \\ **Circuit** \\ **Part** \\ \end{tabular} & \begin{tabular}{c} **SW Support** \\ **Conplexity** \\ **Conplexity** \\ **Conplexity** \\ **not Required** \\ \end{tabular} & \
\begin{tabular}{c} **Tested** \\ **Operational** \\ **Bandwidth** \\ \end{tabular} & **Application**, &
\begin{tabular}{c} **Response Based on** \\ **Combination of** \\ **if Any** \\ \end{tabular} \\ \hline \hline \multicolumn{10}{c}{Proposed} & \multicolumn{1}{c}{Sum of} \\
[3,5,7,9] & both & Yes & OAs, VGAs & passive & Low & Yes & \textless{}1 MHz &
\begin{tabular}{c} **S** \\ **integer-and** \\ **fractional-order** \\ \end{tabular} & Yes \\ \hline \hline \end{tabular}  
* general functional blocks: N/A—information not shown, not available: CCII—current convey of second generation; CFOA—current feedback operational amplifier; DVCICA—differential voltage current controlled current conveyor transconductance amplifier; EX-CCII—extra inputs current convey of second generation; PPA—field programmable analog array; FFCA/DSF—field programmable gate array/digital signal processing; MCDU—modified current differencing unit; OMA—operational amplifier; OTA—operational transconductance amplifier; VDCDC—voltage differencing current conveyor; VGA—variable gain amplifier; low—less than 6 active devices (less than 6 passive devices, solution of CPE excluded). medium—between 6 and 10 active devices, high—more than 10 active devices.  
\end{table} 
Table 1: _Cont._[PERSON]. [PERSON] et al. [2] brought a solution of the lossless integrator using a fractional-order passive element (FOE), known also as constant phase element (CPE) as a part of feedback loop of operational amplifier (OA) followed by inverter. However, adjustability and other features (two different slopes in magnitude frequency responses, various starting and final phase shifts in observed bandwidth, etc.) are not studied. [PERSON] et al. [3] presents integrators/differentiators implemented by complex active CMOS circuitry with the benefit of simple electronic reconfiguration. A similar approach was used by [PERSON] et al. [4] where resulting integrators/differentiators are used for the design of a special type of filter performing also the sum/subtraction of current outputs. The synthesis of an active emulator of FOE based on operational transconductance amplifiers and its implementation in an OA-based lossless integrator is shown by [PERSON] et al. [5]. Special active building blocks used in works [3; 4; 5; 8] utilize approximation of the fractional-order behavior by higher-integer-order filtering responses allowing the electronic configuration of transfer coefficients (numerator/denominator). Similarly, [PERSON] et al. [6], there is a discrete solution of this topology using passive parameters for appropriate configuration of the transfer. Topology presented by [PERSON] [7] represents one from the simplest examples of device using passive form of FOE-based on serial/parallel interconnections of RC segments. [PERSON] et al. [9] introduces method for the electronic rescalability of the operational bandwidth of the fractional-order integrator, by single DC voltage controlling several capacitance multipliers. Similarly to [PERSON] et al. [6], this topology uses passive parameters for the setting of the response approximating required fractional-order behavior. Note that except [PERSON]. [PERSON] et al. [9], there was no attempt to obtain single a parameter electronic adjustability of time constant in the area of fractional-order two-ports (integrators/differentiators).