Grounded Parallel RL, RC, and LC Immittance Simulators Using VDBAs and Passive Elements

Single current follower differential input transconductance amplifier based grounded lossy capacitance multiplier with large multiplication factor

“…The VDTA in all these circuits is implemented with Arbel–Goldminz cell (one half of complete VDTA configuration). A grounded parallel RC immittance simulator has been presented in Mongkolwai et al 24 using two VDBA, one grounded resistor and one grounded capacitor, with electronically tunable resistance and capacitance and an operating frequency range of 500 kHz–100 MHz. In Pukkalanun et al, 25 two immittance simulator (series RC and parallel RC) circuits have been implemented using a single voltage difference transconductance amplifier (VDTA) and one grounded capacitor, with electronically tunable multiplication factors without passive component matching requirements.…”

“…These circuits can be categorized as lossless/lossy and/or grounded/floating capacitance multiplier circuits and are used in the design of analog filters and oscillators. Many lossless CM circuits 1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and a few lossy capacitance multiplier circuits [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] employing different ABBs have been reported in literature. As the present work focusses on lossy capacitance multipliers, in the following, we provide a detailed description of previously reported lossy CM circuits to put the proposed work in proper perspective.…”

“…From Table 1, it is seen that there have been limited number of designs of lossy capacitance multipliers in the open literature using various ABBs such as VDTA, VDBA, CFOA, OTA, DVTC, and ECCII. [22][23][24][25][26][27][28][29][30][31][32][33][34] A circuit with parallel immittance simulator having negative resistance and positive capacitance is useful in oscillator design and only one circuit, using two CFOAs, two resistors and one capacitor, has been reported in Özer et al 30 Therefore, in this paper, a new lossy capacitance multiplier circuit is proposed using a single CFDITA, one resistor and one capacitor. The performance of the proposed circuit is validated using 0.18 μm CMOS technology with CFDITA, and experimental results using commercially available ICs AD844 and LM13700 are included to support its performance.…”