Title :
Common-mode stability in low-power LO drivers
Author :
Gueorguiev, Svetoslav ; Lindfors, Saska ; Larsen, Torben
Author_Institution :
Radio Frequency Integrated Syst., Aalborg Univ., Denmark
Abstract :
A resonator loaded LO buffer is shown to be potentially common mode unstable, when it is connected to drive a double balanced current steering mixer. The stability margin is found to be inversely proportional to the quality factor of the resonator load and, therefore, to the power consumed by the LO buffer. A known solution to the problem is compared with two proposed ones. The approaches differ in terms of current consumption, occupied voltage headroom and area.
Keywords :
CMOS analogue integrated circuits; Q-factor; buffer circuits; circuit stability; driver circuits; electric current; electric potential; mixers (circuits); network analysis; power consumption; resonators; CMOS up-conversion mixer; common mode unstable; common-mode stability; current consumption; double balanced current steering mixer; low-power LO drivers; low-power local oscillator drivers; occupied voltage headroom; power consumption; quality factor; resonator loaded LO buffer; stability margin; Circuit stability; Driver circuits; Electronic circuits; Energy consumption; Impedance; Integrated circuit technology; Laboratories; Radio frequency; Resistors; Semiconductor device modeling;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465883
