Title :
Power optimized LC VCO and mixer co-design
Author :
Jung, Byunghoo ; Bommalingaiahnapallya, Shubha ; Harjani, Ramesh
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
A capacitively source degenerated buffer provides a negative impedance and can be used as the negative resistance cell in the voltage-controlled oscillator (VCO). This eliminates the need for a negative resistance cell within the VCO itself. Eliminating the negative resistance cell within the VCO allows us to reduce the overall power consumption for a design that combines a VCO with a follow-on mixer stage. Further, as the VCO directly drives the mixer, the input capacitance of the mixer can be incorporated into the degeneration capacitor of the negative resistance cell. In other words, the mixer and VCO when co-designed can result in a significantly more optimal design. This paper presents the design for a prototype 4 GHz LC VCO and a mixer that has been designed for a 5 GHz RF and 1 GHz IF radio application in the 0.18 μm TSMC CMOS technology.
Keywords :
CMOS integrated circuits; buffer circuits; capacitance; mixers (circuits); negative resistance; power consumption; radiofrequency integrated circuits; voltage-controlled oscillators; 0.18 micron; 1 GHz; 4 GHz; 5 GHz; IF radio application; TSMC CMOS technology; VCO; capacitively source degenerated buffer; mixer co-design; negative impedance; negative resistance cell; power consumption; power optimized LC VCO; voltage-controlled oscillator; Bandwidth; CMOS technology; Capacitance; Capacitors; Design optimization; Energy consumption; Impedance; Prototypes; Radio frequency; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465605
