±0.5V BiCMOS class-A and class-AB Current Conveyor structures

2008 ◽  
Author(s):  
Subodh Thankachan ◽  
Manisha Pattanaik ◽  
S. S. Rajput
Keyword(s):  
Current Conveyor ◽  
Class Ab ◽  
Class A

scholarly journals Implementation of Power-Efficient Class AB Miller Amplifiers Using Resistive Local Common-Mode Feedback

2021 ◽  
Vol 11 (3) ◽  
pp. 31
Author(s):  
Anindita Paul ◽  
Mario Renteria-Pinon ◽  
Jaime Ramirez-Angulo ◽  
Ricardo Bolaños-Pérez ◽  
Héctor Vázquez-Leal ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Figure Of Merit ◽  
Small Signal ◽  
Common Mode ◽  
Power Efficient ◽  
Class Ab ◽  
Op Amp ◽  
Class A ◽  
Wide Range ◽  
Quiescent Current

An approach to implement single-ended power-efficient static class-AB Miller op-amps with symmetrical and significantly enhanced slew-rate and accurately controlled output quiescent current is introduced. The proposed op-amp can drive a wide range of resistive and capacitive loads. The output positive and negative currents can be much higher than the total op-amp quiescent current. The enhanced performance is achieved by utilizing a simple low-power auxiliary amplifier with resistive local common-mode feedback that increases the quiescent power dissipation by less than 10%. The proposed class AB op-amp is characterized by significantly enhanced large-signal dynamic, static current efficiency, and small-signal figures of merits. The dynamic current efficiency is 15.6 higher, the static current efficiency is 8.9 times higher, and the small-signal figure of merit is 2.3 times higher than the conventional class-A op-amp. A global figure of merit that determines an op-amp’s ultimate speed is 6.33 times higher than the conventional class A op-amp.

Micropower class AB CMOS current conveyor based on quasi-floating gate techniques

2009 ◽  
Author(s):  
Antonio J. Lopez-Martin ◽  
Lucia Acosta ◽  
Jose M. Algueta ◽  
Jaime Ramirez-Angulo ◽  
Ramon G. Carvajal
Keyword(s):  
Current Conveyor ◽  
Floating Gate ◽  
Class Ab

Class A and Class AB CMOS-Only Nanopower Memristive Dynamics Emulators

2016 ◽  
Vol 26 (08) ◽  
pp. 1650127 ◽  
Author(s):  
Itır Köymen ◽  
Konstantinos N. Glaros ◽  
Emmanuel M. Drakakis
Keyword(s):  
Geometric Mean ◽  
Hysteresis Loops ◽  
High Yield ◽  
Weak Inversion ◽  
Mos Capacitors ◽  
Zero Crossing ◽  
Class Ab ◽  
Class A ◽  
Input Amplitude ◽  
Simulation Results

Memristive dynamics are generated utilizing active, weak-inversion, CMOS circuits. Class A and Class AB approaches to the generation of these dynamics are presented. The Class A circuit is composed of a grounded capacitor and two exponential transconductors (E-cells). It consumes a few nanowatts of power from a 1V power supply. The Class AB circuit also consists of a similar architecture with an added geometric mean splitter. Simulation results confirm the realization of pinched hysteresis loops exhibiting the zero crossing property of the memristor. The effects of varying input amplitude and frequency as well as the capacitor value are investigated. With the use of MOS capacitors in the place of monolithic capacitors, the area requirements of these emulators can be significantly diminished. Simulation results of circuits with both types of capacitors are presented. The simple emulators presented here offer the possibility of realizing nanoscale memristor dynamics when high yield memristor processes are not accessible.

FULLY PROGRAMMABLE UNIVERSAL FILTER WITH INDEPENDENT GAIN-ω0-Q CONTROL BASED ON NEW DIGITALLY PROGRAMMABLE CMOS CCII

2009 ◽  
Vol 18 (05) ◽  
pp. 875-897 ◽  
Author(s):  
TAREK M. HASSAN ◽  
SOLIMAN A. MAHMOUD
Keyword(s):  
Cmos Technology ◽  
Code Word ◽  
Current Conveyor ◽  
Current Gain ◽  
Current Conveyors ◽  
High Current ◽  
Universal Filter ◽  
Output Stage ◽  
Class Ab ◽  
Digitally Programmable

A fully programmable second-order universal filter with independently controllable characteristics is presented in this paper. The proposed filter is based on a new ± 0.75 V second-generation current conveyor with digitally programmable current gain. The input stage of the current conveyor is realized using two complementary MOS differential pairs to ensure rail-to-rail operation. The output stage consists of a Class-AB CMOS push-pull network, which guarantees high current driving capability with a 47.2 μA standby current. The digital programmability of the current conveyor, based on transistor arrays and MOS switches, provides variable current gain using a digital code-word. Two approaches for implementing current conveyors with programmable current gain either greater or less than one are described. The fully programmable universal filter and the proposed digitally programmable current conveyor circuits are simulated using PSPICE with 0.25 μm CMOS technology from MOSIS.

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