Electronically tunable capacitance multiplier and frequency-dependent negative-resistance simulator using the current-controlled current conveyor

DVCC-based floating capacitance multiplier design

“…Thus, active device-based capacitance multiplier design is used to obtain large-valued capacitors for standard silicon-based technology. There are a number of capacitance multiplier circuits implemented with some active devices such as operational amplifiers [5,6], second-generation current conveyors (CCIIs) or current-controlled current conveyors (CCCIIs) [7][8][9][10][11][12][13][14][15][16][17], operational transconductance amplifiers (OTAs) [18][19][20], current follower transconductance amplifiers (CFTAs) [21], tunable four terminal floating nullors (TFTFNs) [22], current-controlled differential difference current conveyors (CCDDCCs) [23], differential voltage current conveyors (DVCCs) [24][25][26][27][28][29], fully differential voltage and current gained second-generation current conveyors (FD VCG-CCIIs) [30], differential voltage current conveyor transconductance amplifiers (DVCCTA) [31], voltage differencing current conveyors (VDCCs) [32], and current controlled current conveyor transconductance amplifier (CCCCTAs) [33]. Some previously published capacitance multipliers [5,10,13,17,24] need large-valued resistors for large-valued capacitors.…”

“…Some previously published capacitance multipliers [5,10,13,17,24] need large-valued resistors for large-valued capacitors. The other capacitance multipliers [9,12,16,[18][19][20][21][22][23]27,28] require large currents to obtain large capacitor values. However, the proposed floating capacitance multiplier can realize large capacitor values with two small-valued resistors.…”

“…However, the proposed floating capacitance multiplier can realize large capacitor values with two small-valued resistors. The dynamic range of OTAs using bias currents is limited and therefore OTA-based capacitance multipliers have dynamic range problems [9]. The CCIIs and DVCCs [34], which have larger linearity and dynamic range, are attractive devices for obtaining capacitance multipliers.…”

New grounded immittance function simulators using single current feedback operational amplifier

“…Use of commercially unavailable integrated circuits such as the differential voltage current conveyor (DVCC); see for example [2,3], the fully differential second-generation current conveyor (FDCCII); see for example [5,23], the third-generation current conveyor (CCIII); see for example [7,8], the current differencing buffered amplifier (CDBA); see for example [9], the operational transresistance amplifier (OTRA); see for example [13], the gain-variable third-generation current conveyor (GVCCIII); see for example [16], the modified inverting first-generation current conveyor (MICCI); see for example [17], the modified currentfeedback operational amplifier (MCFOA); see for example [18], the current-controlled second-generation current conveyor (CCCII); see for example [20,22], the dual-x second-generation current conveyor (DXCCII); see for example [24] and the dual-output second-generation current conveyor (DO-CCII); see for example [25]. 2.…”

Parasitic compensation in CCI-based circuits for reduced power consumption

“…To show the workability of the compensation method, a new frequency dependent negative resistor (FDNR) simulator using three first-generation current conveyors (CCIs) is proposed. It is well known that due to the difficulties in the implementation of inductors in ICs, inductance or FDNR simulators using active elements [5][6][7][8][9][10][11][12][13][14][15] are widely used in the implementation of LC ladder filters. The proposed FDNR circuit is then used to construct a third-order high-pass filter.…”