Title :
Modelling differential pairs for low-distortion amplifier design
Author :
de Lange, E.K. ; De Feo, O. ; van Staveren, A.
Author_Institution :
Swiss Fed. Inst. of Technol., Ecublens, Switzerland
Abstract :
The differential pair is one of the basic amplifying stages in amplifier design. Aiming at the the design of low-distortion amplifiers, a simple model for a differential pair is derived using the Volterra series. The parameters in this model correspond to the well-known small-signal parameters, furthermore the effect of the non-ideal tail-current source is made explicit in the model. The model gives insight in the way distortion is generated in a differential pair and it therefore allows the establishment of some simple design rules. Although being derived from a very simple model, the expressions give a good accordance with simulations.
Keywords :
Volterra series; differential amplifiers; distortion; network synthesis; Volterra series; differential pair model; low-distortion amplifier design; nonideal tail-current source; small-signal parameters; Appropriate technology; Bandwidth; Circuits; Closed-form solution; Differential amplifiers; Ear; Feedback; Harmonic distortion; Radio frequency; Radiofrequency amplifiers;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205550
