Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 Università di Catania Facoltà di Ingegneria...
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Transcript of Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 Università di Catania Facoltà di Ingegneria...
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
Università di CataniaFacoltà di IngegneriaDIEESCatania - ITALY
STMicroelectronicsCatania site
Low-Phase-Noise 18-GHz Low-Phase-Noise 18-GHz Voltage-Controlled Voltage-Controlled
OscillatorOscillatorAngelo Scuderi and Giuseppe Palmisano
Radio Frequency Advanced Design Center (RF-ADC)
Elettronica delle microonde e delle onde millimetriche – A1
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
OutlineOutline
VCO for 17-GHz receiver
Transformer-based topology
High-Q resonator
Circuit design
Experimental results
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
VCO for 17-GHz receiverVCO for 17-GHz receiver
HIPERLINK standard exploits the 17-GHz ISM band and will provide a link between local 5-GHz WLANs and metropolitan networks.
A multi-band receiver at 5 and 17 GHz allows high-level of integration but requires a local oscillator with wide tuning capabilities and low-noise performance.
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
Transformer-based topologyTransformer-based topology
Thanks to a transformer the resonator exploits an inductive
coupling, consequently, both biasing resistors (RVV and RBB) and
coupling capacitors (CVV and CBB) are removed improving phase
noise and tuning range, respectively.
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
High-Q resonatorHigh-Q resonatorAn issue of great concern is the fabrication of high-Q resonator in a low-cost bipolar technology (17 mask steps) supplied by STMicroelectronics.
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
Circuit design Circuit design The VCO is composed of a transformer-based core oscillating at 9 GHz followed by a frequency doubler to obtain a working frequency of 18 GHz. The frequency doubler is composed by a full-wave rectifier and a comparator, whose frequency response was increased by using a zero-peaking technique.
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
Experimental results Experimental results
16
17
18
19
20
21
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Control voltage [V]
Fre
quen
cy [
GH
z]
The VCO exhibits a tuning range of 4.1 GHz from 16.4 to 20.5 GHz, when the control voltage
VTUNE sweeps from 0 to 3 V.
The measured phase noise is -109 dBc/Hz at 1-MHz offset from a carrier of 18.5 GHz.
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
See you later …See you later …
Poster A1 Poster A1