Title :
Input resistances of the single-input active-load differential amplifier
Author :
Glas, Gregorio Oscar ; Zola, Julio Guillermo
Author_Institution :
Fac. of Eng., Buenos Aires Univ., Argentina
fDate :
1/1/1994 12:00:00 AM
Abstract :
In a current mirror-loaded differential amplifier stage with bipolar transistors in low frequency, the resistances as seen from the inverting and noninverting inputs are different. This occurs although the circuit is perfectly balanced in currents, and identical transistors in the pair and the current mirror source are assumed. Simple expressions of the resistances from each input are obtained, which show a strong dependence on the Early voltage of the circuit devices
Keywords :
circuit analysis computing; differential amplifiers; nonlinear network analysis; Early voltage; bipolar transistors; circuit analysis; computer simulation; current mirror-loaded differential amplifier stage; input resistance; inverting input; noninverting input; resistively loaded emitter coupled pair; single-input active-load differential amplifier; Chaos; Circuit synthesis; Control system synthesis; Differential amplifiers; Nonlinear equations; Nonlinear systems; Output feedback; Poles and zeros; State-space methods; Transfer functions;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
