Title :
Quad Band Digitally Controlled Oscillator for WCDMA Transmitter in 90nm CMOS
Author :
Akhtar, Siraj ; Ipek, Mehmet ; Lin, Jerry ; Staszewski, Robert Bogdan ; Litmanen, Petteri
Author_Institution :
Texas Instrum. Inc., Dallas, TX
Abstract :
We present the first published implementation and measurements of a fully integrated phase path for a 3G polar transmitter in deep sub micron CMOS. It includes a single quad band digitally controlled oscillator (DCO) providing modulation capability to handle the wide bandwidth of the WCDMA phase (frequency) data and a switched inverter divider. The complete chip, with integrated LDOs, consumes 20mA from a 1.4V supply while providing a PN of -157dBc/Hz at a 40MHz offset for a 2GHz output
Keywords :
CMOS integrated circuits; UHF oscillators; code division multiple access; dividing circuits; radio transmitters; 1.4 V; 2 GHz; 20 mA; 3G polar transmitter; 90 nm; WCDMA phase data; WCDMA transmitter; deep submicron CMOS; quad band digitally controlled oscillator; switched inverter divider; Bandwidth; Digital control; Digital modulation; Frequency conversion; Multiaccess communication; Oscillators; Phase measurement; Phase modulation; Semiconductor device measurement; Transmitters; 3G; 90nm; DCO; WCDMA; divider; polar transmitter; wide modulation range;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320849
