A new design topology for low-voltage CMOS current feedback amplifiers

Square/Triangular Wave Generator Using Single DO-DVCC and Three Grounded Passive Components

“…Current conveyor (CC) was the first introduced current-mode active device, which was reported in 1968 [3]. Since then, several novel active devices have been reported [4][5][6][7][8][9][10]. Square/triangular wave generators have wide applications in instrument, measurement, communication, and power conversion circuit control systems.…”

Third order lowpass Butterworth filters using unity gain current amplifiers

“…Recently some such filters using voltage buffers and current amplifiers are reported [3]. With the availability of CDBA [4] and CFA [5,6] type active building blocks, there is renewed interest on analog function circuits using these devices [7,8,9,10,11,12,13,14]. These elements are essentially unity-gain current amplifiers with the provision of additional voltage follower feature.…”

“…These elements are essentially unity-gain current amplifiers with the provision of additional voltage follower feature. The literature describes several advantageous properties [3,6,15] of these elements. Albeit some second order filters [7,8,9,10,11,12,13,14] are now available, a third order Butterworth filter design scheme using these devices had not yet been reported.…”

Low-Voltage Current Feedback Operational Amplifiers

“…Several CMOS CFOAs topologies have been introduced in [4][5][6][7]10]. The minimum supply voltage requirement for the topologies in [4][5][6] and [10] is equal to V T + 2V DS,sat , where V T is the threshold voltage and V DS,sat is the drain-source saturation voltage of a MOS transistor.…”

“…The minimum supply voltage requirement for the topologies in [4][5][6] and [10] is equal to V T + 2V DS,sat , where V T is the threshold voltage and V DS,sat is the drain-source saturation voltage of a MOS transistor. In [7] the corresponding value is equal to V T + 3V DS,sat .…”