tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt9202 pre1.0 - 1 - august, 2007 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 se rvo 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. programmabl e 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/rflv l/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 di fferential 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
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt9202 pre1.0 - 2 - august, 2007 dvd analog front-end preliminary pt9202 auto laser power control ? support opu of twin lasers ? programmable laser power ? support high loop gain of alpc circui t to avoid laser power variation voltage bias circuit ? support programmable havc for opu bias voltage ? support vref for internal circuit reference voltage
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt9202 pre1.0 - 3 - august, 2007 dvd analog front-end preliminary pt9202 block diagram rfip rfin ma mb mc md tpi tni cdmdi dvdmdi fop fon cdldo dvdldo havc 4d sum a+b+c+d astigmatic 2d sum (a+c),(b+d ) alpc block programmable bw m u x m u x voltage reference block rfop rfon rflvl lseo rfo rflvl att vga equalizer level control charge pump circuit mode control pro g rammable offset programmable gain 4 programmable bw pro g rammable offset pro g rammable gain fe balance gca eq comp. pd gca eq comp. gca eq comp. pd gca eq comp. ma mb mc md 4 pro g rammable bw pro g rammable offset pro g rammable gain 2d sum (a+d),(b+c) programmable bw programmable offset te balance peak hold envelope sel bottom hold envelope lpf rfrpo pro g rammable bw pro g rammable offset pro g rammable gain m u x + - + - dac vref analo g test block atest1 atest2 rfrp rfzc fe te iref level shift m u x dac + - dfto + - 4 programmable gain m u x hpf 8khz dft lpf lpf dac blanko + - lselpf eqiref agcc rfo fdfto lpfcap m u x phenv lsec lselpf m u x rfrp bhenv
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt9202 pre1.0 - 4 - august, 2007 dvd analog front-end preliminary pt9202 application circuit
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt9202 pre1.0 - 5 - august, 2007 dvd analog front-end preliminary pt9202 order information valid part number package type top code PT9202-LQ(l) 64 pins, lqfp PT9202-LQ
|
