dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T11:21:09Z | |
dc.date.available | 2014-05-27T11:21:09Z | |
dc.date.created | 2014-05-27T11:21:09Z | |
dc.date.issued | 2004-09-07 | |
dc.identifier | Proceedings - IEEE International Symposium on Circuits and Systems, v. 1. | |
dc.identifier | 0271-4310 | |
dc.identifier | http://hdl.handle.net/11449/67875 | |
dc.identifier | 10.1109/ISCAS.2004.1328313 | |
dc.identifier | WOS:000223122300198 | |
dc.identifier | 2-s2.0-4344578485 | |
dc.description.abstract | A quasi-sinusoidal linearly tunable OTA-C VCO built with triode-region transconductors is presented. Oscillation upon power-on is ensured by RHP poles associated with gate-drain capacitances of OTA input devices. Since the OTA nonlinearity stabilizes the amplitude, the oscillation frequency f0 is first-order independent of VDD, making the VCO adequate to mixed-mode designs. A range of simulations attests the theoretical analysis. As part of a DPLL, the VCO was prototyped on a 0.8μm CMOS process, occupying an area of 0.15mm2. Nominal f0 is 1MHz, with K VCo=8.4KHz/mV. Measured sensitivity to VDD is below 2.17, while phase noise is -86dBc at 100-KHz offset. The feasibility of the VCO for higher frequencies is verified by a redesign based on a 0.35μm CMOS process and VDD=3.3V, with a linear frequency-span of l3.2MHz - 61.5MHz. | |
dc.language | eng | |
dc.relation | Proceedings - IEEE International Symposium on Circuits and Systems | |
dc.relation | 0,237 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Capacitance | |
dc.subject | CMOS integrated circuits | |
dc.subject | Computer simulation | |
dc.subject | Electric conductance | |
dc.subject | Electric potential | |
dc.subject | Jitter | |
dc.subject | Logic design | |
dc.subject | MOSFET devices | |
dc.subject | Switching | |
dc.subject | Transconductance | |
dc.subject | Transfer functions | |
dc.subject | OTA | |
dc.subject | Phase noise | |
dc.subject | Ring oscillators | |
dc.subject | Waveforms | |
dc.subject | Variable frequency oscillators | |
dc.title | A low-voltage low-sensitivity sinusoidal VCO for DPLL realizations | |
dc.type | Actas de congresos | |