Symbolic Analysis of Input Impedance of CMOS Floating Active Inductors with Application in Fully Differential Bandpass Amplifier

Author

Tripetch, Kittipong

Author_Institution

Fac. of Eng. & Archit., Rajamangala Univ. of Technol. Suvarnabhumi, Nonthaburi, Thailand

fYear

2014

fDate

18-21 May 2014

Firstpage

1

Lastpage

6

Abstract

This paper proposes a study of input impedance of 2 types of CMOS active inductors. It derives 2 input impedance formulas. The first formula is the input impedance of the grounded active inductor. The second formula is the input impedance of the floating active inductor. After that, these formulas can be used to simulate magnitude and phase response of input impedance as a function of current consumption with MATLAB. Common mode rejection ratio (CMRR) of the fully differential bandpass amplifier is derived based on superposition principle. CMRR as a function of input frequency is plotted as a function of current consumption.

Keywords

CMOS integrated circuits; active networks; band-pass filters; differential amplifiers; inductors; CMOS floating active inductors; MATLAB; common mode rejection ratio; current consumption; fully differential bandpass amplifier; grounded active inductor; input impedance; superposition principle; Active inductors; Capacitance; Impedance; Logic gates; Resistors; Resonant frequency; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2014 IEEE 79th

Conference_Location

Seoul

Type

conf

DOI

10.1109/VTCSpring.2014.7023115

Filename

7023115