A new type of CMOS electro-optical charge-mixer is presented, who's functionality is based on the Charge Pumping (CP) phenomenon. The device uses two PMOS transistors with bulk-embedded photodiode to detect the intensity and phase of a modulated light signal. Using clocking between accumulation and inversion, the two transistors transfer to output charge packets that are synchronous and proportional to the light intensity. A device replica is used to compensate for both, background illumination and offset charge. This latter peculiarity depends on the photo-sensor bias voltage. The device is implemented in a standard 0.35μm CMOS and operates from a single 3.3V supply. Using a 12mW/cm 2 pulsed light source with a pulse width of 500ns, the charge-mixer estimates the phase delay with an accuracy of 3%. © 2006 IEEE.
Massari, N., Gottardi, M., Baschirotto, A. (2006). A 3.3V CMOS charge-pumping offset-compensated optical charge-mixer with 3% phase accuracy. In Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European (pp.560-563). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE [10.1109/ESSCIR.2006.307486].
A 3.3V CMOS charge-pumping offset-compensated optical charge-mixer with 3% phase accuracy
BASCHIROTTO, ANDREA
2006
Abstract
A new type of CMOS electro-optical charge-mixer is presented, who's functionality is based on the Charge Pumping (CP) phenomenon. The device uses two PMOS transistors with bulk-embedded photodiode to detect the intensity and phase of a modulated light signal. Using clocking between accumulation and inversion, the two transistors transfer to output charge packets that are synchronous and proportional to the light intensity. A device replica is used to compensate for both, background illumination and offset charge. This latter peculiarity depends on the photo-sensor bias voltage. The device is implemented in a standard 0.35μm CMOS and operates from a single 3.3V supply. Using a 12mW/cm 2 pulsed light source with a pulse width of 500ns, the charge-mixer estimates the phase delay with an accuracy of 3%. © 2006 IEEE.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
