A transconductance boosted CMOS current differencing transconductance amplifier (TBCDTA) and its application

On the gm‐boosted common source with source degeneration and its configuration as a transimpedance amplifier

“…A basic g m ‐boosted common source with source degeneration was introduced in literature 2 but without comprehensive small‐signal analysis. The g m ‐boosting technique has been employed in many analog building blocks such as transconductance amplifiers 6 , TIAs 7 , RF frontend LNA 8 , RF mixers 9 , sensor instrumentation amplifier, 10 and so forth. In several recent articles, using a simplified inspection technique , 11 the second author reported many CMOS g m ‐boosted topologies, which were analyzed by providing their complete mid‐band gain derivation, which was not available before.…”

A novel design of current differencing transconductance amplifier with high transconductance gain and enhanced bandwidth

“…A high performance CDTA with enhanced bandwidth was reported in which tuning of transconductance was achieved by varying the bias voltage [30]. Another structure of transconductance boosted CDTA has been reported in which biasing current is kept constant and transconductance is varied by changing the number of parallel MOSFETs used in place of differential pair MOSFETs [31]. Later on, positive feedback technique has been used in the active load of differential pair of CDTA to achieve higher value of transconductance [32].…”

Performance enhancement of current differencing transconductance amplifier (CDTA) by using a new approach of gm boosting and its application

“…It has continuously drawn attention to the researchers due to its advantages of larger dynamic range, lower power consumption and wider bandwidth. There are few papers published on different structures of CDTA [2][3][4][5][6][7][8][9][10] in which its advantages and disadvantages have been shown and compared with other state of the art solutions. Apart from work on the structures of CDTA, there are numerous papers published on the applications such as current limiter [11], filters [12][13][14][15][16][17][18][19], modulators [20], multiplier [21], oscillators [22][23][24][25][26][27][28][29][30][31][32][33][34][35], rectifiers [36][37][38], Schmitt trigger [39], and squarer and square rooter circuit [40].…”

“…The first method is reported recently in Rai and Gupta (2015) while the second method is a novel one. These methods can also be merged together to enhance the transconductance of other analog building blocks (ABBs).…”