No abstract

No abstract

This paper aims to introduce a novel Fully Differential second generation Current Conveyor (FDCCII) and its application to design a novel Low Power (LP), very high CMRR, and wide bandwidth (BW) Current Mode Instrumentation Amplifier (CMIA). In the proposed application, CMRR, as the most important feature, has been greatly improved by using both common mode feed forward (CMFF) and common mode feedback (CMFB) techniques, which are verified by a perfect circuit analysis. As another unique quality, it neither needs well-matched active blocks nor matched resistors but inherently improves CMRR, BW, and power consumption hence gains an excellent matchless choice for integration. The FDCCII has been designed using 0. 1-IntroductionIn the last decades, researchers and designers of analog processors have been faced with serious challenges in the design of low-voltage (LV), low-power (LP) circuits and systems. That is due the increasing demand for mobile and battery powered equipment and also technology down scaling trend [1]. Current mode (CM) signal processing/design as a promising solution to these challenges has thus gained more popularity [1][2][3][4][5]. As the main reason of the superiority of CM processors over the Voltage Mode (VM) ones can name: the wider dynamic range, simpler circuitry, wider BW, higher speed/frequency, lower supply voltage and consumed power [4][5][6][7][8][9][10][11][12][13][14]. Besides, while the Voltage Mode Instrumentation Amplifiers (VMIA) seriously suffer from problems of dependency of BW on gain and CMRR value, and need tightly matched resistor (to improve the CMRR), most favorably, the Current Mode Instrumentation Amplifiers (CMIA) are free from such requirements [6][7][8][9][10][11][12][13][14][15][16][17][18]. Various structures of CMIA have yet been reported, among which CMIAs based on FDCCIIs take the lead; because these structures are free from well-matched active blocks, as well as matched resistors to gain a high CMRR. The second generation current conveyors (CCIIs) are active blocks that have been used in many analog circuits such as oscillators [19][20][21][22][23], active filters [24][25][26] and amplifiers [6][7][8][9][10][11][12][13][14][15][16][17][18] to grant current mode benefits. The fully differential type of CCIIs [19][20][21][22] benefits from differential input and output terminals that are strongly acknowledged today. In this paper we seek to design a novel FDCCII structure to realize a high CMRR IA. 2-Proposed FDCCIIFunctional block diagram and operational matrix of an ideal FDCCII are shown in Figure 1 and Equation 1, respectively.

No abstract

No abstract