ref: 2012v014.doc preliminary revision: 0.14 date: 97.07.29 page 1 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. device specifications - preliminary information QX2012 qxpander ? processor general description the qxpander ? (qx2000 chip series) is a bipolar analog stereo enhancement processor using the patented qxpander ? technique to produce a spatial or widened stereo image from ordinary left and right channel inputs or from a mono input. the QX2012 provides variable spread of the spatial or widened stereo image. enhancement is achieved without any initial encoding of the input signals and no additional speakers are required. digital controls the QX2012 can be configured for a mono or stereo imput type using the digital control input . configuring for a mono input activates the internal mono to stereo simulator. the QX2012 can be bypassed using the digital control input . this allows the stereo input signal to pass through the chip unaltered. the QX2012 is fabricated using bipolar technology and is available in plastic 24 pin sdip. other package options may be offered upon request. features produce a wide sound image (with variable spread) from normal stereo input accepts mono input and creates stereo, spatially enhanced output no encoding of input signals is required two digital control signals for input type and bypass control low noise: 75 uv rms . high snr: 83 db (typical) applications television sound systems (stereo). hardware applications for desktop pcs multimedia speaker systems. video games. m /s qen/byp
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 2 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. pin assignment rin gr1 gr2 gr3 gr4 m/s ref qfo qfi qen/byp rout qf4 qf3 qf2 qf1 fc gl4 gl3 gl2 gl1 lin vcc 18 17 16 15 19 20 21 22 23 24 14 7 8 9 10 6 5 4 3 2 1 11 gnd lout 12 13 figure 1: sdip-24 pin assignment principles of operation. in ordinary stereo systems, the stereo image is formed between the left and right speakers, and is confined by the speaker positions (i.e., the "sound stage" is located between the two speakers). qxpander ? is designed to form the stereo image beyond the speakers, thus enlarging the "sound stage". using the spread control, the level of the stereo enhancement (width emphasis) can be adjusted to satisfy the listener. figure 2 shows the spatial response of the qxpander ? min spread max spread bypass speakers relative image width figure 2: QX2012 spatial response normally, the qxpander ? is used in the preamplifier stage between the source and the stereo amplifier stages used to drive the speakers. the qxpander ? enhancements can be disabled using the bypass control allowing the unchanged input signal to pass through to the amplifier stages. the qxpander ? can also accept a mono input signal and creates a spatially enhanced stereo output. input 0 stereo 1 mono table 1: input type control function 0 bypass 1 qsound table 2: qsound, bypass control m/s qen/byp
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 3 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. simulated stereo spatial enhancement right input left input left output right output spread control mono stereo bypass qxpanded stereo bypass figure 3: qxpander ? simplified block diagram absolute maximum ratings * information subject to change without notice. symbol parameter min max unit v cc dc power supply 15 v v ina analog input voltage 0 vcc v v ind digital input voltage 0 5.0 v p d power dissipation, sdip24 1000 mw t a operating temperature 0 70 c t st g storage temperature -40 +125 c warning: operation of the device at or beyond these limits may result in permanent damage to the device. table 3: maximum operating conditions recommended operating conditions parameter symbol rating unit supply voltage v cc,op 4.5 ~ 12.0 v operating temperature t opr -20 ~ +75 c table 4: recommended operating conditions
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 4 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. digital characteristics vcc = +5 to +12 vdc unless otherwise noted. gnd = 0 vdc, t a = +25 c symbol parameter conditions min typ max units v ih high-level input voltage v cc = +9.0 v 2.1 5.0 v v il low-level input voltage 0 0.4 0.7 v i ih high-level input current v cc = +9.0 v v ih = 5.0 v 350 ua i il low-level input current v il = 0.0 v -10 ua notes: digital inputs should be driven with levels between 0v and +5 v relative to gnd. table 5: digital signal conditions analog characteristics : (v cc = 9v, t a = +25 c, v byp = 5v, lin=rin=0v rms, unless otherwise specified.) parameter tc sym min typ max unit supply current i cc 20 26 ma input impedance r i 21 30 39 k w input voltage, analog,1 1 v in,1 1.0 1.4 v rms input voltage, analog,2 2 v in,2 0.5 0.7 v rms voltage gain, qxpander,1 3 g q x,1 1.5 3.5 5.5 db voltage gain, qxpander,2 4 g q x,2 -2.0 0 2.0 db voltage gain, qxpander,3 5 g q x,3 1.5 3.5 5.5 db voltage gain, qxpander,4 6 g q x,4 -2.0 0 2.0 db voltage gain, bypass,1 7 g b y ,1 -7.5 -5.5 -3.5 db voltage gain, bypass,2 8 g b y ,2 -7.5 -5.5 -3.5 db total harmonic distortion, qxpander 9 thd q x 0.4 1.0 % total harmonic distortion, bypass 10 thd b y 0.4 0.8 % output noise voltage, qxpander 11 v no ,q x 75 150 m v rms output noise voltage, bypass 12 v no , b y 20 40 m v rms signal-noise ratio, qxpander snr 75 83 db signal-noise ratio, bypass snr 88 94 db channel balance 13 cb -1.5 0 +1.5 db byp terminal voltage, h 14 v b y ,h 2.1 v byp terminal voltage, l 15 v b y ,l 0.7 v byp terminal current, h 16 i b y ,h 350 m a byp terminal current, l 17 i b y ,l -10 m a
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 5 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. insertion loss 10 -7 db power supply rejection ratio psrr 50 db output voltage, analog v out 1.0 v rms output current, analog i out 10 ma load resistance r l 10 k w load capacitance c l 1000 pf usable bandwidth bw 20 20000 hz table 6: analog characteristics test conditions: 1. f=1khz, lin and rin 0 phase difference, and output voltage t.h.d. no greater than 1%. 2. f=1khz, lin and rin 180 phase difference, and output voltage t.h.d. no greater than 1%. 3. lin=1 v rms , 1 khz, rin=0 v, at lout. 4. lin=1 v rms , 1 khz, rin=0 v, at rout. 5. lin=0 v, rin=1 v rms , 1 khz, at rout. 6. lin=0 v, rin=1 v rms , 1 khz, at lout. 7. lin=1 v rms , 1 khz, rin=0 v, v byp =0v, at lout. 8. lin=0 v, rin=1 v rms , 1 khz, v byp =0v, at rout. 9. total harmonic distortion (thd) at lout and rout (qxpander active): a) lin = 1 v rms , rin = 0 v. b) lin = 0 v, rin = 1 v rms . 10. test condition 8, v byp = 0v (bypass) 11. bw = 20 ~ 20000 hz, lin = rin = 0 v, a curve, qxpander ? active: at lout and rout. 12. bw = 20 ~ 20000 hz, lin = rin = 0 v, a curve, v byp = 0 v (bypass): at lout and rout. 13. lin = rin = 1 v rms , 1 khz, v byp = 0 v (bypass), rout - lout (r - l). 14. high-level input voltage of byp terminal, qxpander ? mode, maximum spread 15. low-level input voltage of byp terminal, bypass mode, no spread (normal stereo). 16. input current of byp terminal, v byp =5v 17. input current of byp terminal, v byp =0v
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 6 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. package data ordering code package code package type QX2012-p24c p24 plastic sdip plastic sdip 24 lead 300 mil 0.070 pitch units: mm p24 80 . 015 ~ 025 005 01 . . . - + 65 02 .. 1 778 . 23 0 0 3 .. 001 .42 . 105 01 03 . . . - + 735 05 .. 395 03 .. 0735 01 03 . . . - + 1 12 13 24 figure 4: sdip24 package option
QX2012 qxpander processor device specifications qsound labs preliminary revision: 0.14 date: 97.07.29 page 7 of 7 note: the device data in these specifications are based on engineering samples, and are preliminary. QX2012 specifications are subject to change without notice. 1 2 34 a b c d 4 3 2 1 d c b a 1 qsound labs, inc. 2748 - 37th avenue ne calgary, ab t1y 5l3 canada 1 qxpander processor QX2012 11 29-jul-1997 10:37:31 u:\data\..\2012_6.sch title size: number: date: file: revision: sheet of time: a + c11 22uf + c10 22uf + c1 22uf + c2 22uf lin rin notes: resistor tolerance: +/- 1% non-polarized capacitor tolerance: +/- 5% c3 6800pf c4 0.1uf c5 1000pf c12 10nf c13 10nf c14 10nf c15 10nf c16 0.1uf c17 1000pf c18 6800pf r2 50k r4 7k5 vcc r9 7k5 r10 7k5 vcc vctl sw1 mono sw2 qxpander vctl vctl r1 33k r3 33k input enabled c6 0.1uf c9 0.1uf stereo bypass left out right out min max + c7 47uf + c8 22uf input + c19 100uf spread control 1 gr1 2 gr2 3 gr3 4 gr4 5 m/s 6 ref 7 qfo 8 qfi 9 qen/b 10 11 gnd 12 13 qf4 14 qf3 15 qf2 16 qf1 17 fc 18 gl4 19 gl3 20 gl2 21 gl1 22 virtual audio qxpander processor lin rin lout rout 23 vcc 24 u3 QX2012 d1 figure 5: QX2012 qxpander ? typical application
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