Title :
A new detector architecture for optical pickup units in DVD systems
Author :
Hehemann, I. ; Brockherde, W. ; Bussmann, A. ; Hofmann, H. ; Kemna, A. ; Kokozinski, R. ; Richter, H. ; Hosticka, B.J.
Author_Institution :
Fraunhofer-Inst. of Microelectron. Circuits & Syst., Duisburg, Germany
Abstract :
This paper describes a new detector architecture for optical pickup units in DVD systems. Apart from data recovery it allows the detection of the spatial light intensity distribution to facilitate a new way of servo signal generation and enables crosstalk detection. The readout of the data is carried out using transimpedance amplifiers which have a calculated -3 dB bandwidth of 140 MHz at 96 dBΩ DC-gain and 9.34 nArms input noise current. Image acquisition of the laser spot is realized using the integrating photodiode method. Each pixel of a 5×5 array is read out at 500 kHz and driven by an analog multiplexer. The circuitry is currently fabricated in a 0.6 μm standard CMOS technology.
Keywords :
CMOS integrated circuits; circuit simulation; consumer electronics; integrated circuit design; integrated circuit noise; integrated optoelectronics; multiplexing equipment; optical crosstalk; optical sensors; photodetectors; photodiodes; pick-ups; readout electronics; servomechanisms; video discs; video equipment; 0.6 micron; 140 MHz; 25 pixel; 5 pixel; 500 kHz; 9.34 nA; CMOS technology; DC-gain; DVD systems; amplifier bandwidth; analog multiplexer; crosstalk detection; data readout; data recovery; detector architecture; input noise current; integrating photodiode method; laser spot image acquisition; optical pickup units; pixel array read out; servo signal generation; spatial light intensity distribution detection; transimpedance amplifiers; Bandwidth; CMOS technology; Circuit noise; DVD; Optical amplifiers; Optical crosstalk; Optical detectors; Servomechanisms; Signal generators; Stimulated emission;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010383
