Title :
Compensating very high-speed current feedback op-amps
Author :
Celma, S. ; Pérez, F. ; Martínez, P.A.
Author_Institution :
Fac. de Ciencias, Zaragoza Univ., Spain
Abstract :
In this paper we present an analytical model and a detailed stability analysis for current feedback operational amplifiers (CFOAs). Consequently, this permit us to obtain mathematically the components of the feedback loop. Besides, this model could be considered as the kernel of a SPICE macromodel. Different high frequency compensation techniques are introduced depending on the operation conditions. Problems to high frequency CFOAs are addressed covering feedback loop and both load and input capacitances
Keywords :
compensation; feedback amplifiers; frequency-domain analysis; operational amplifiers; stability; SPICE macromodel; current feedback operational amplifiers; external compensation; feedback loop; high frequency compensation; input capacitances; internal compensation; load; stability analysis; Bandwidth; Circuits; Electronic mail; Feedback loop; Impedance; Operational amplifiers; Radio frequency; SPICE; Stability; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.612408
