Title :
PM and AM noise in common base amplifier
Author :
Boldyreva, T.I. ; Kuleshov, V.N.
Author_Institution :
Moscow Power Eng. Inst., Russia
Abstract :
Theoretical analysis of PM and AM noise introduced by common base (CB) bipolar transistor amplifier and comparison of CB and common emitter (CE) amplifiers are presented. The analysis is based on the approach and the models developed and used in the papers (1997, 1998). Power spectral densities (PSD) of PM and AM noises of CB amplifier (both wideband and 1/f type) are found as functions of a harmonic signal frequency, available power of the signal source and parameters of biasing circuits. Comparison of PM and AM noises, introduced by CB amplifier and CE amplifier with unbypassed emitter resistor is also presented and discussed. PM noise of the amplifiers is discussed taking into consideration available power of signal source that is necessary to provide the same output voltage across the same load impedance
Keywords :
1/f noise; amplifiers; amplitude modulation; bipolar transistor circuits; circuit noise; harmonic analysis; network analysis; phase modulation; phase noise; AM noise; CE amplifier; PM noise; biasing circuits; common base amplifier; common base bipolar transistor amplifier; common emitter amplifiers; harmonic signal frequency; power spectral densities; signal source; unbypassed emitter resistor; Broadband amplifiers; Circuit noise; Feedback circuits; Fluctuations; Frequency; Impedance; Noise reduction; Power amplifiers; Resistors; Voltage;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.841552
