Current Controlled CCTA Based- Novel Grounded Capacitance Multiplier with Temperature Compensation

Abstract

This article introduces a grounded capacitance multiplier employing current controlled current conveyor transconductance amplifiers (CCCCTAs). The provided capacitor is a grounded element. Its outstanding feature is that the capacitive value can be electronically adjusted by input bias currents of the CCCCTA and is temperature-insensitive. The circuit construction comprises two CCCCTAs, cooperating with a grounded capacitor. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation. Application as a fifth-order Chebyshev low-pass filter is included.

Capacitance Multiplier Using Small Values of Multiplication Factors for Adjustability Extension and Parasitic Resistance Cancellation Technique

“…The following conclusions were established from the analysis of the works included in Table I: a) Existing solutions allow achieving very high ranges and values of MF, which obviously require very large ranges of driving parameters (bias currents, etc.) - [3], [4], [6], [9], [11]. Table I indicates this value as the capacity ratioa case when equivalent capacity is tuned between maximal and minimal values.…”

“…Table I indicates this value as the capacity ratioa case when equivalent capacity is tuned between maximal and minimal values. High values of gains lead to processing of very low signal levels [6], [11]. b) Despite of a wide change of capacity, the ratio of the highest and the lowest values of the considered driving force is high (efficiency of adjustment) - [4], [6], [11].…”

“…High values of gains lead to processing of very low signal levels [6], [11]. b) Despite of a wide change of capacity, the ratio of the highest and the lowest values of the considered driving force is high (efficiency of adjustment) - [4], [6], [11]. c) In some circuits [5], [7], [9], [14], [17], [21], [24], [25], the number of needed passive elements is high.…”

Realizations of Grounded Negative Capacitance Using CFOAs

“…This includes positive inductor simulators ( [6,14,18,[29][30][31][32][33] and references cited therein), capacitance multipliers [5,11,21] and frequency-dependent negative resistors (FDNRs) [15,20]. There also have been attempts to realize generalized negative impedance convertors (GNICs), which would be suitable for simulating negative impedances.…”

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.…”