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| Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw DVD Analog Front-End Preliminary PT9202 DESCRIPTION The PT9202 device is a high performance DVD RF chip, it supports up to DVD 4X and CD 20X reading. Base on analog circuit part that contains some servo functions for track and focus controller; RF attenuator, AGC, programmable equalizer for DVD read channel. Auto laser power control circuit supports twin lasers system of OPU. Programmable functions of PT9202 are controlled by internal registers. FEATURES READ CHANNEL * * * * * * * * * * * * * * 60MHz bandwidth VGA gain range is from 1.70dB to 23.65dBV Support high gain mode for RW disc VGA support auto gain control mode and hold mode Programmable attenuator(min:0.25V/V,2bit resolution) Programmable amplitude of RF signal Programmable attack current for speeding up AGC loop Low leakage current when AGC hold mode Programmable cutoff frequency of RFEQ, range is from 2.3MHz to 27.4MHz 20% Fc accuracy Programmable boost gain range of RFEQ is from 0dB to 13.4dB Less than 2% total harmonic distortion 7th RF equalizer and 2Fc constant group delay 5% group delay variation SERVO * 40/80KHz for FE/RFLVL module * Programmable offset adjust for FE, range is 2480mV. For TE, 1st stage range is 240mV, 2nd stage range is 1200mV. For LSE, range is 620mV. For RFLVL/RFRP, 1st stage range is 120mV, 2nd stage range is 1200mV * Programmable gain for FE/TE/LSE/RFLVL/RFRP, range is from -3dB to 28dB * 2nd low pass filter for TE/RFRP module, range is from 75KHz to 300KHz * Support high gain mode for CDRW/DVD+-RW/DVD9 disc * Support defect/finger print/blank area detector * Support 2 methods(three beam, DPD) for TE generator * Support 2 methods(Astigmatic and Knife -edge) for FE generator * Support FE/TE balance gain for signal unbalance calibration * Programmable equalizer for the differential phase detection circuit * Support 3 bit GCA gain stage for input signals of DPD circuit, range is from -12dB to 16 dB * Support defect protection function for DPD circuit * Support BCA detect function PT9202 PRE1.0 -1August, 2007 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw DVD Analog Front-End Preliminary PT9202 AUTO LASER POWER CONTROL * Support OPU of twin lasers * Programmable laser power * Support high loop gain of ALPC circuit to avoid laser power variation VOLTAGE BIAS CIRCUIT * Support programmable HAVC for OPU bias voltage * Support VREF for internal circuit reference voltage PT9202 PRE1.0 -2- August, 2007 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw DVD Analog Front-End Preliminary PT9202 BLOCK DIAGRAM AGCC EQIREF M RFIP ATT RFIN VGA Equalizer U RFOP RFO RFON X DFT Mode control Charge Pump circuit Level Control HPF 8KHz 4D SUM A+B+C+D Programmable BW Programmable Gain Level Shift Programmable Offset RFLVL MA MB MC MD 4 Astigmatic 2D SUM (A+C),(B+D ) M U X FE Balance Programmable BW Programmable Gain Programmable Offset FE 4 MA MB GCA GCA EQ EQ Comp. PD Comp. M U X PD TE Balance Programmable BW Programmable Gain Programmable Offset TE MC FOP FON TPI TNI MD GCA GCA EQ EQ Comp. Comp. LSEC PHENV 2D SUM (A+D),(B+C) Programmable Gain Programmable Offset Programmable BW LSELPF M U X LSEO 4 LSELPF Analog Test Block M U X FDFTO + DAC RFLVL LPF CDMDI + DVDMDI ALPC BLOCK CDLDO BLANKO + DVDLDO DAC LPF DAC M U X + DFTO ATEST1 ATEST2 HAVC IREF VREF Voltage Reference Block RFO Peak hold envelope Bottom hold envelope SEL Programmable BW Programmable Gain Programmable Offset RFRP BHENV M U X RFRPO + RFRP LPF - RFZC LPFCAP PT9202 PRE1.0 -3- August, 2007 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw DVD Analog Front-End Preliminary PT9202 APPLICATION CIRCUIT PT9202 PRE1.0 -4- August, 2007 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw DVD Analog Front-End Preliminary PT9202 ORDER INFORMATION Valid Part Number PT9202-LQ(L) Package Type 64 Pins, LQFP Top Code PT9202-LQ PT9202 PRE1.0 -5- August, 2007 |
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