Title :
A monolithic low phase noise 1.7GHz CMOS VCO for zero-IF cellular CDMA receivers
Author :
Yue Wu ; Aparin, Vladimir
Author_Institution :
Qualcomm, San Diego, CA, USA
Abstract :
This paper presents a 1.7 GHz CMOS VCO with low-noise regulator which is implemented in a 0.25 μm 5M process for zero-IF cellular CDMA receivers. A grounded varactor topology, using the junction diodes of an NFET transistor, is employed for fine tuning. The VCO has 350 MHz tuning range and achieves phase noise <-134 dBc/Hz at 900 kHz offset under a noisy supply (0.37 pV/√Hz PSD). The DC power sensitivity is smaller than 25 kHz/V.
Keywords :
CMOS analogue integrated circuits; UHF oscillators; cellular radio; circuit tuning; code division multiple access; phase noise; radio receivers; varactors; voltage regulators; voltage-controlled oscillators; 0.25 micron; 1.7 GHz; CMOS; DC power sensitivity; NFET transistor junction diodes; UHF VCO; cellular CDMA receiver; fine tuning; grounded varactor topology; low-noise regulator; monolithic low phase noise VCO; tuning range; zero-IF cellular CDMA receivers; 1f noise; Circuit noise; Frequency; Inductors; Low-frequency noise; Multiaccess communication; Noise generators; Phase noise; Power supplies; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2004. Digest of Technical Papers. ISSCC. 2004 IEEE International
Print_ISBN :
0-7803-8267-6
DOI :
10.1109/ISSCC.2004.1332761
