Title :
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
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;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2014 IEEE 79th
Conference_Location :
Seoul
DOI :
10.1109/VTCSpring.2014.7023115
