New systematic two‐graph‐based approach of active filters employing multiple output current controlled conveyors

Abstract

A new method for the synthesis of active RC circuits employing multiple output current controlled conveyors (Mo-CCCIIs) is presented here. A new graph is proposed for Mo-CCCII and the application of this graph in active filter design is studied. The obtained active filter uses Mo-CCCIIs as active devices and only capacitors as passive elements without the need of passive resistors. To generalise the proposed method, an algorithm is presented, which converts the loop-cut-set matrices of the passive LC filter prototypes to the proper matrices for Mo-CCCII-based active filters. The new matrices characterise the connections of the equivalent Mo-CCCII-based active filter. The presented algorithm is programmed in MATLAB, so the matrix manipulation is done very quickly. Also, Hspice simulation result of the synthesised active filter is given to confirm the viability of this approach.

Multiple output second-generation current conveyor utilizing high frequency output stage

“…The presented MOCCII amplifier can be easily used in signal conditioning and filtering application. Available multiple outputs are also of great value and can considerably simplify a target system [6].…”

“…Since its introduction [1] current conveyors have been widely used in analogue signal processing applications. To date, many variations of current conveyors have been presented, both with positive and negative current gains, of generations identified from I to III and also having multiple outputs [2][3][4][5][6]. In this paper, a multiple output secondgeneration current conveyor (MOCCII) is presented.…”

High‐order realisation of MOSFET‐only band‐pass filters for RF applications

“…a 2 = C gs1 + C gs4 C gs2 (15) From (11) and (12), it can be calculated that pole frequency, quality factor and gains of the filter in the centre frequency are…”

“…However, the output resistance of MOS transistor have low effect on pole frequency, quality factor and gains of the first presented filter. Transfer functions of VM and TAM BPF given in (11) and (12) have an extra term in numerator due to the output resistance of MOS transistor. This will disturb the low-frequency response of the filter.…”

“…There are many published high-order band-pass filters (BPF) in the literature [3][4][5][6][7][8][9][10][11][12][13]. Acar and Ozoguz [3] reported an nth order voltage transfer function which can be obtained using signal-flow graph approach.…”