Title :
Solutions for CMOS current amplifiers with high-drive output stages
Author :
Palmisano, Giuseppe ; Palumbo, Gaetano ; Pennisi, Salvatore
Author_Institution :
Dipt. Elettrico, Elettronico e Sistemistico, Catania Univ., Italy
fDate :
10/1/2000 12:00:00 AM
Abstract :
Design guidelines for CMOS current amplifiers with a high-drive capability are discussed in detail, paying special attention to the implementation of output stages with improved linearity performance. As a design example, two different current amplifiers were realized in a 1.2-μm process and experimentally tested. Both circuits used a 5-V power supply and dissipated 5.5 and 4 mW, respectively. The open-loop gain was found to be 90 and 100 dB and the gain-bandwidth product was 8 and 10 MHz. The two amplifiers provide bipolar output currents as high as 15 and 7 mA, with a maximum total harmonic distortion of around -54 dB, using a quiescent current in the output branches of only 200 μA
Keywords :
CMOS analogue integrated circuits; current-mode circuits; harmonic distortion; integrated circuit design; operational amplifiers; 1.2 micron; 100 dB; 15 mA; 200 muA; 4 mW; 5 V; 5.5 mW; 7 mA; 90 dB; CMOS current amplifiers; bipolar output currents; gain-bandwidth product; high-drive output stages; linearity performance; open-loop gain; quiescent current; total harmonic distortion; Associate members; Circuit testing; Differential amplifiers; Equivalent circuits; Guidelines; High power amplifiers; Linearity; Operational amplifiers; Power supplies; Voltage;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
