Title :
A high-performance CMOS voltage follower
Author :
Palumbo, G. ; Pennisi, S.
Author_Institution :
Dipt. Elettrico, Elettronico e Sistemistico, Catania Univ., Italy
Abstract :
A high-performance class A CMOS voltage follower is presented which is also suitable for the implementation of current conveyors and current-mode amplifiers. The circuit is based on a symmetric two-gain-stages closed-loop topology which provides a virtual zero systematic offset and highly reduces harmonic distortion and transfer gain error. Simulations on a 1.2 μm design, supplied with a single 5 V DC voltage, show a 100 kHz THD better than -70 dB, even with a sinusoidal input amplitude of 1.5 V and a DC transfer gain error less than 0.1%. Moreover, the proposed design achieves a 3 dB bandwidth of 18 MHz and an output resistance of 130 Ω
Keywords :
CMOS analogue integrated circuits; current conveyors; current-mode circuits; harmonic distortion; operational amplifiers; 1.2 micron; 130 ohm; 18 MHz; 5 V; CMOS voltage follower; THD; class-A voltage follower; current conveyors; current-mode amplifiers; harmonic distortion reduction; high-performance voltage follower; symmetric two-gain-stages closed-loop topology; transfer gain error reduction; Bandwidth; Capacitors; Circuit simulation; Circuit topology; Harmonic distortion; Linearity; Performance gain; Signal design; Signal processing; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.814813
