Current-mode rectifier configuration based on OFCC

Abstract

This paper presents a current-mode (CM) rectifier configuration using single operational floating current conveyor (OFCC). Ad ditionally, the topology uses two MOS transis tors operating as switches and is suitable for integration. The SPICE simulations using 0.18 Ilm TSMC CMOS technology parameters have been included to verify the theoretical predictions.

New Current-Mode Precision Full-Wave Rectifier Employing Single Inverted Z-Copy Current Differencing Buffered Amplifier

“…Moreover, the current-mode brings advantages on performances like lower power consumption, greater linearity, higher dynamic range, temperature sensitivity and structural benefits such as circuit simplicity. [8,9] Numerous precision full-wave rectifier designs employing different current-mode active building blocks namely, second generation current conveyor (CCII), [1][2][3][4][5] dual-X second generation current conveyor (DX-CCII), [5,10] dual-output second generation current conveyor (DO-CCII), [11] secondgeneration current controlled conveyor (CCCII), [12] multiple output current controlled current conveyor (MO-CCCII), [13] extra-X second generation current conveyor (EX-CCII), [14][15][16] current feedback operational amplifier (CFOA), [17] current differencing transconductance amplifier (CDTA), [18] modified Z-copy current difference transconductance amplifier (MZC-CDTA) [19], operational conveyor (OC), [20] operational transconductance amplifier (OTA), [21] differential voltage current conveyor (DVCC), [21,22] dual-output operational transconductance amplifier (DO-OTA), [23] operational transresistance amplifiers (OTRA), [24] floating current source (FCS), [25] operational floating current conveyor (OFCC) [26], differential difference current conveyors (DDCC), [27] differential voltage current conveyor transconductance amplifier (DVCCTA), [28] current differencing buffered amplifier (CDBA), [29] etc. have already been reported in literature.…”

“…[2,11,12,17,24,28] • Cannot provide dual phase outputs from the same topology. [2][3][4][5]10,11,13,14,[16][17][18][19][20][21][22][23][26][27][28] • Requirement of comparatively large supply voltage. [1][2][3][4][5] • Operating frequency is comparatively low.…”

“…[1][2][3][4][5] • Operating frequency is comparatively low. [1][2][3][4][5][10][11][12][13][14][15][16][17][18][19][20][21][22]24,26,28] • Dissipate relatively large power. [2, 11-19, 22, 25-27] • Employs mixed active devices.…”

“…[1, 2, 10, 13, 17, 20-23, 25, 27, 28] • Input dynamic range is comparatively low. [11,14,16,19,21,[25][26][27] • Output is affected by temperature variation. [25] • Output noise is comparatively large.…”

A New Proposal for OFCC-based Instrumentation Amplifier

“…The operational floating current conveyor (OFCC) [1] is a variant of current conveyor with attractive features of both high and low impedance at input and output ports which make it suitable for sensing both currents and voltage and providing the sensed variable in form of current and voltage. The OFCC has been used to develop variable gain amplifier [1], basic amplifier circuits (voltage, current, transimpedance and transconductance) [2][3][4], filters [5][6][7][8][9][10], instrumentation amplifier [11], [12], readout circuits [13], logarithmic amplifier [14], rectifier [15], and wheatstone bridge [16] in recent past.…”