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 0.35mum 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%

A 3.3V CMOS Charge-Pumping Offset-Compensated Optical Charge-Mixer with 3% Phase Accuracy

Massari, Nicola;Gottardi, Massimo;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 0.35mum 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%
9781424403035
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/8739
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
social impact