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LTC1059 High Performance Switched Capacitor Universal Filter
FEATURES

DESCRIPTIO

All Filter Parameters Guaranteed Over Temperature Wide Center Frequency Range (0.1Hz to 40kHz) Low Noise, Wide Dynamic Range Guaranteed Operation for 2.37V and 5V Supply Low Power Consumption Guaranteed Clock-to-Center Frequency Accuracy of 0.8% Guaranteed Low Offset Voltages Over Temperature Very Low Center Frequency and Q Tempco Clock Input T2L or CMOS Compatible Separate Highpass (or Notch or Allpass), Bandpass, Lowpass Outputs
APPLICATIO S

The LTC(R)1059 consists of a general purpose, high performance, active filter building block and an uncommitted op amp. The filter building block together with an external clock and 2 to 5 resistors can produce various 2nd order functions which are available at its three output pins. Two out of three always provide lowpass and bandpass functions while the third output pin can produce notch or highpass or allpass. The center frequency of these functions can be tuned from 0.1Hz to 40kHz and is dependent on an external clock or an external clock and a resistor ratio. The filter can handle input frequencies up to 100kHz. The uncommitted op amp can be used to obtain additional allpass and notch functions, for gain adjustment or for cascading techniques. Higher than 2nd order filter functions can be obtained by cascading the LTC1059 with the LTC1060 dual universal filter or the LTC1061 triple universal filter. Any classical filter realization (such as Butterworth, Cauer, Bessel and Chebyshev) can be formed. The LTC1059 can be operated with single or dual supplies ranging from 2.37V to 8V (or 4.74V to 16V single supply). The LTC1059 is manufactured by using Linear Technology's enhanced LTCMOSTM silicon gate process.
Sinewave Oscillators Sweepable Bandpass/Notch Filters Full Audio Frequency Filters Tracking Filters
, LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
50k 1 7.15k VIN DC-200kHz 50k 2 3 4 5 8V 6 7
Wide Range 2nd Order Bandpass/Notch Filter with Q = 10
1.2
CENTER FREQUENCY ERROR NORMALIZED TO 5kHz MEASUREMENT (%)
Center Frequency and Q Error
1.0 0.8 0.6 0.4 0.2 Q ERROR 0 0 5 10 15 20 25 30 35 40 IDEAL CENTER FREQUENCY (kHz) 0 45 CENTER FREQUENCY ERROR TA = 25C CLOCK = 35.35 CENTER FREQUENCY 1 30
DEVIATION FROM IDEAL Q OF 10 (%)
NOTCH OUT BP OUT BP LP 14
LTC1059 13 V02 N/AP/HP INV1 S1 SA INV2 AGND V- 12 11 10 9 8 -8V
V + 50/100/HOLD LSh CLK
T2L CLOCK IN 2MHz
1059 TA01a
U
25 20 15 10 5
1058 TA01b
U
U
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LTC1059
ABSOLUTE
(Note 1)
TOP VIEW
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
BP N/AP/HP INV1 S1 SA V+ LSh 1 2 3 4 5 6 7 14 LP 13 V02 12 INV2 11 AGND 10 V - 9 8 50/100/HOLD CLK
Supply Voltage ........................................................ 18V Power Dissipation .............................................. 500mW Operating Temperature Range LTC1059C ................................... -40C TA 85C LTC1059AM, LTC1059M ........... -55C TA 125C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
ORDER PART NUMBER LTC1059CN LTC1059CS
N PACKAGE 14-LEAD PDIP
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 110C, JA = 130C/W (N) TJMAX = 110C, JA = 110C/W (S) J PACKAGE 14-LEAD CERDIP TJMAX = 150C, JA = 80C/W
OBSOLETE PACKAGE
Consider the N or S Package for Alternate Source
LTC1059ACJ LTC1059AMJ LTC1059CJ LTC1059MJ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER Center Frequency Range, f0
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C.
(Complete Filter) VS = 5V, T2L clock input level unless otherwise specified.
CONDITIONS f0 * Q 400kHz, Mode 1 f0 * Q 1.6MHz, Mode 1 f0 * Q 250kHz, Mode 3, VS = 7.5V f0 * Q 1MHz, Mode 3, VS = 7.5V MIN TYP 0.1 - 40k 0.1 - 18k 0.1 - 20k 0.1 - 16k 0 - 200k Mode 1, 50:1, fCLK = 250kHz, Q = 10 Mode 1, 100:1, fCLK = 500kHz, Q = 10 Q Accuracy f0 Temperature Coefficient Q Temperature Coefficient DC Offset VOS1 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS2 VOS3 VOS3 VOS3 VOS3 Mode 1, 50:1 or 100:1, f0 = 5kHz Q = 10 Mode 1, fCLK < 500kHz Mode 1, fCLK < 500kHz, Q = 10 fCLK = 250kHz, 50:1, SA High (N Package) fCLK = 250kHz, 50:1, SA High (S Package) fCLK = 500kHz, 100:1, SA High (N Package) fCLK = 500kHz, 100:1, SA High (S Package) fCLK = 250kHz, 50:1, SA Low (N Package) fCLK = 250kHz, 50:1, SA Low (S Package) fCLK = 500kHz, 100:1, SA Low (N Package) fCLK = 500kHz, 100:1, SA Low (S Package) fCLK = 250kHz, 50:1 (N Package) fCLK = 250kHz, 50:1 (S Package) fCLK = 500kHz, 100:1 (N Package) fCLK = 500kHz, 100:1 (S Package)

MAX
UNITS Hz Hz Hz Hz Hz
Input Frequency Range Clock-to-Center Frequency Ratio
50 0.8% 100 0.8% 0.5 5 15 2 3 3 6 6 2 2 4 4 2 2 4 4 15 30 40 60 80 20 30 40 60 20 30 40 60 5 % ppm/C ppm/C mV mV mV mV mV mV mV mV mV mV mV mV mV
2
U
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U
U
WW
W
LTC1059
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Complete Filter) VS = 5V, T2L Clock Input Level unless otherwise specified.
PARAMETER DC Lowpass Gain Accuracy BP Gain Accuracy at f0 Clock Feedthrough Max Clock Frequency Power Supply Current
ELECTRICAL CHARACTERISTICS
CONDITIONS Mode 1, R1 = R2 = 50k Mode 1, Q = 10, f0 = 5kHz fCLK 1MHz Mode 1, Q < 5, VS 5V
MIN
TYP 0.1 0.1 10 2 3.5
MAX 2
UNITS % % mV MHz
5.5 7
mA mA
(Complete Filter) VS = 2.37V unless otherwise specified.
PARAMETER Center Frequency Range Input Frequency Range Clock-to-Center Frequency Ratio Mode 1, 50:1, fCLK = 250kHz, Q = 10 Mode 1, 100:1, fCLK = 250kHz, Q = 10 Q Accuracy Max Clock Frequency Power Supply Current Mode 1, fCLK = 250kHz, Q = 10 50:1 and 100:1 50 0.8% 100 0.8% 2 700 1.5 2.5 % kHz mA CONDITIONS f0 * Q 120kHz, Mode 1, 50:1 f0 * Q 120kHz, Mode 3, 50:1 MIN TYP 0.1 - 12k 0.1 - 10k 60k MAX UNITS Hz Hz Hz
(Internal Op Amps) The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C.
PARAMETER Supply Voltage Range Voltage Swings VS = 5V, RL = 5k (Pins 1, 14) RL = 3.5k (Pins 2, 13) Input Offset Voltage Input Bias Current Output Short-Circuit Current Source/Sink DC Open Loop Gain GBW Slew Rate VS = 5V (N Package) VS = 5V (S Package) VS = 5V VS = 5V VS = 5V

CONDITIONS
MIN 2.375 3.8 3.6
TYP
MAX 8
UNITS V V V
4.2 1 3 40/3 25/3 80 2 7 15
mV pA mA mA dB MHz V/s
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
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LTC1059 TYPICAL PERFOR A CE CHARACTERISTICS
Graph 1. Mode 1: (fCLK/f0) Deviation vs Q
0.8 VS = 5V 0.4 TA = 25C = 250kHz f 0 CLK
% DEVIATION (fCLK/f0 )
% DEVIATION (fCLK/f0 )
-0.4 -0.8 -1.2 -1.6 -2.0 -2.4 -2.8 -3.2 0.1 1 IDEAL Q
1060 G01
0 - 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6
fCLK = 50 (TEST POINT) f0
Q ENHANCEMENT (%)
10
Graph 4. Mode 1: Q Error vs Clock Frequency
VS = 7.5V TA = 25C fCLK = 100:1 f0 Q = 10 50-100 5
Q ERR0R (%)
DEVIATION FROM 100:1 (%)
20
Q ENHANCEMENT (%)
10 0 20 50 10 f CLK 100 = 50:1 f0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G04
Q = 10
Graph 7. Mode 1: (fCLK/f0) vs fCLK and Q
0.8 0.6
DEVIATION FROM 100:1 (%)
DEVIATION FROM 50:1 (%)
0.4 Q = 50 0.2 0 -0.2 -0.4 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1.6 Q = 20 Q = 10
0.6 125C 0.4 0.2 0 -0.2 0.2 85C TA = 25C -55C
DEVIATION FROM 50:1 (%)
VS = 5V TA = 25C fCLK = 50:1 f0
Q=5
4
UW
5
1059 G07
Graph 2. Mode 1: (fCLK/f0) Deviation vs Q
0.3 VS = 5V 0.2 TA = 25C = 500kHz f 0.1 CLK fCLK fCLK = 100 (TEST POINT) f0
Graph 3. Mode 1: Q Error vs Clock Frequency
TA = 25C VS = 2.5V VS = 5V fCLK Q = 10 20 f = 100:1 Q = 20 0 5 5 100 20 50 10 0 20 10 0 VS = 2.5V VS = 5V Q = 20 Q = 10 100 5 20 50
5
100
- 0.7 0.1
fCLK = 50:1 f0
1 IDEAL Q
10
100
1060 G02
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1060 G03
Graph 5. Mode 1: Measured Q vs fCLK and Temperature
VS = 5V Q = 10 20 fCLK = 100:1 f0 0 -55C fCLK = 50:1 f0 125C 85C TA = 25C 0 -55C
-0.4
Graph 6. Mode 1: (fCLK/f0) vs fCLK and Q
0.8 0.6 0.4 0.2 0 -0.2 VS = 5V TA = 25C fCLK = 100:1 f0
125C
TA = 25C 85C
Q = 50 Q = 10 Q=5
20
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G05
0
0.2
0.4
0.6 0.8 1.0 fCLK (MHz)
1.2
1.4
1.6
1059 G06
Graph 8. Mode 1: (fCLK/f0) vs fCLK and Temperature
1.0 VS = 5V Q = 10 0.8 fCLK = 100:1 f0
1.0
Graph 9. Mode 1: (fCLK/f0) vs fCLK and Temperature
VS = 5V Q = 10 0.8 fCLK = 50:1 f0 0.6 125C 0.4 85C 0.2 -55C 0 -0.2 0.2 TA = 25C
0.4
0.6
0.8 1.0 1.2 fCLK (MHz)
1.4
1.6
1.8
0.4
0.6
0.8 1.0 1.2 fCLK (MHz)
1.4
1.6
1.8
1059 G08
1059 G09
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LTC1059 TYPICAL PERFOR A CE CHARACTERISTICS
Graph 10. Mode 1: (fCLK/f0) vs fCLK and Q
1.0 0.8 0.6 0.4 0.2 Q = 50 0 Q = 20 Q = 10 Q=5 -0.2 0 0.1 VS = 2.5V TA = 25C fCLK = 100:1 f0
DEVIATION FROM 100:1 (%)
DEVIATION FROM 100:1 (%)
DEVIATION FROM 50:1 (%)
0.2
0.3 0.4 0.5 fCLK (MHz)
Graph 13. Mode 1: (fCLK/f0) vs fCLK and Temperature
1.0 VS = 2.5V Q = 10 0.8 fCLK = 50:1 f0 0.6 0.4 0.2 0 -0.2 0 0.2 0.4 0.6 0.8 fCLK (MHz) 1.0 1.2
1059 G13
DEVIATION OF (fCLK/f0 ) WITH RESPECT TO Q = 10 MEASUREMENT (%)
DEVIATION FROM 50:1 (%)
NOTCH DEPTH (dB)
TA = 25C 85C
125C
Graph 16. Mode 3: Q Error vs Clock Frequency
TA = 25C VS = 2.5V VS = 5V fCLK = 100:1 Q = 10 f0 Q = 10 50 5 5 20
20
Q ENHANCEMENT (%)
Q ENHANCEMENT (%)
0 20 10 0 VS = 2.5V VS = 5V Q = 10 5 50 Q = 10 5 20
0 20 10 0 Q = 10 50 fCLK = 50:1 f0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G17
Q ERR0R (%)
10
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G16
UW
0.6 0.7
-55C fCLK = 50:1 f0
Graph 11. Mode 1: (fCLK/f0) vs fCLK and Q
0.8 VS = 2.5V TA = 25C 0.6 fCLK = 50:1 f0
1.0 0.8 0.6
Graph 12. Mode 1: (fCLK/f0) vs fCLK and Temperature
VS = 2.5V Q = 10 fCLK = 100:1 f0
85C TA = 25C
0.4 0.2 Q = 50 Q = 20
0.4 0.2 0
125C
-55C
0 Q = 10 -0.2 Q=5 -0.4 0 0.1 0.2 0.3 0.4 0.5 fCLK (MHz) 0.6 0.7 0.8
-0.2 0 0.2 0.4 0.6 0.8 fCLK (MHz) 1.0 1.2
0.8
1059 G10
1059 G11
1059 * G12
Graph 14. Mode 1: Notch Depth vs Clock Frequency
120 100 80 60 40 20 0 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1.6 Q = 10 50:1 Q = 10 100:1 Q=1 100:1 0.4 VS = 5V TA = 25C VIN = 1VRMS 0.3 0.2 0.1 0 - 0.1 - 0.2 - 0.3 - 0.4 - 0.5
Graph 15. Mode 3: Deviation of (fCLK/f0) with Respect to Q = 10 Measurement
VS = 5V TA = 25C PIN 9 AT 100:1
fCLK fCLK = 500:1 f0 R2 = 5 R4 (A)
(B)
fCLK fCLK = 200:1 f0 R2 = 2 R4
- 0.6 0.1
1
IDEAL Q
10
100
1059 G15
1059 G14
Graph 17. Mode 3 (R2 = R4): Q Error vs Clock Frequency
VS = 7.5V TA = 25C 20 fCLK = 100:1 f0 10 Q = 10 50
Graph 18. Mode 3 (R2 = R4): Measured Q vs fCLK and Temperature
VS = 5V Q = 10 20 fCLK = 100:1 f0 0 125C 85C TA = 25C -55C
5
125C 20 0
85C
TA = 25C -55C
5
fCLK = 50:1 f0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G18
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LTC1059 TYPICAL PERFOR A CE CHARACTERISTICS
Graph 19. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Q
0.8 0.6 0.4 0.2 Q = 20 0 Q = 10 -0.2 -0.4 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1.6 Q=5 VS = 5V TA = 25C fCLK = 100:1 f0 0.8 0.6
DEVIATION FROM 50:1 (%)
DEVIATION FROM 100:1 (%)
DEVIATION FROM 100:1 (%)
Graph 22. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature
1.0 VS = 5V Q = 10 0.8 fCLK = 50:1 f0 0.6 0.4 125C 0.2 0 -0.2 0.2 85C TA = 25C -55C
DEVIATION FROM 100:1 (%)
DEVIATION FROM 50:1 (%)
DEVIATION FROM 50:1 (%)
0.4
0.6
0.8 1.0 1.2 fCLK (MHz)
1.4
Graph 25. Mode 1c (R5 = 0), Mode 2 (R2 = R4): Q Error vs Clock Frequency
VS = 5V TA = 25C 20 fCLK = 70.7:1 f0 10 0 20 10 0 MODE 2 R2 = R4 Q = 20 fCLK = 35.35:1 f0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 fCLK (MHz)
1059 G25
POWER SUPPLY CURRENT (mA)
Q ENHANCEMENT (%)
6
UW
1059 G19
Graph 20. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Q
VS = 5V TA = 25C fCLK = 50:1 f0
Graph 21. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature
1.0 VS = 5V Q = 10 0.8 fCLK = 100:1 f0 0.6 0.4 0.2 -55C 0 -0.2 0.2 125C
0.4 0.2 Q = 50 0 -0.2 Q=5 -0.4 0 0.2 0.4 0.6 0.8 1.0 fCLK (MHz) 1.2 1.4 1.6 Q = 20 Q = 10
85C TA = 25C
0.4
0.6
0.8 1.0 1.2 fCLK (MHz)
1.4
1.6
1.8
1059 G20
1059 G21
Graph 23. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature
0.8 VS = 2.5V Q = 10 0.6 fCLK = 100:1 f0 0.4 -55C 0.2 0 -0.2 -0.4 125C 85C TA = 25C 0.8
Graph 24. Mode 3 (R2 = R4): (fCLK/f0) vs fCLK and Temperature
VS = 2.5V Q = 10 0.6 fCLK = 50:1 f0 0.4 125C 0.2 0 -0.2 -0.4
85C
TA = 25C
-55C
1.6
1.8
0
0.2
0.4
0.6 0.8 fCLK (MHz)
1.0
1.2
1059 G23
0
0.2
0.4
0.6 0.8 fCLK (MHz)
1.0
1.2
1059 G24
1059 G22
Graph 26. Supply Current vs Supply Voltage
10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 POWER SUPPLY VOLTAGE (V)
1059 G26
MODE 2 R2 = R4 Q = 20
MODE 1C Q = 20 Q = 10
TA = -55C TA = 25C
MODE 1C Q = 20 Q = 10
TA = 125C
1059fd
LTC1059
BLOCK DIAGRA W
V- 10 INV1 3 N/AP/HP S1 2 4 - V+ 6 BP 1 LP 14
+ -
+
-
AGND 11 SA 5 CLK 8 LSh 7 50/100/HOLD 9 CONTROL LEVEL SHIFT NON-OVERLAP CLOCK INV2 12 AGND
+
13 VO2
-
1059 BD
APPLICATIO S I FOR ATIO
The LTC1059 is compatible with the LTC1060. All the LTC1059 pins are functionally equivalent to the LTC1060 pins bearing the same title. For a detailed pin description and definition of various modes of operation refer to the LTC1060 data sheet. The LTC1059 is typically "faster" than the LTC1060 especially under single 5V (or 2.5V) supply
PACKAGE DESCRIPTIO
J Package 14-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
.005 (0.127) MIN .785 (19.939) MAX 14 13 12 11 10 9 8
.025 (0.635) RAD TYP
.300 BSC (7.62 BSC)
.008 - .018 (0.203 - 0.457)
0 - 15
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
operation. This becomes apparent through the Typical Performance Characteristics of the part. All the graphs shown in this data sheet have been drawn under the same test conditions as in the LTC1060 data sheet; they are also numbered in the same order. For complete discussion of the filter characteristics see the LTC1060 data sheet.
.220 - .310 (5.588 - 7.874) 1 2 3 4 5 6 7 .200 (5.080) MAX .015 - .060 (0.381 - 1.524) .045 - .065 (1.143 - 1.651) .014 - .026 (0.360 - 0.660) .100 (2.54) BSC .125 (3.175) MIN
J14 0801
U
W
UU
OBSOLETE PACKAGE
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LTC1059
PACKAGE DESCRIPTIO U
N Package 14-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.770* (19.558) MAX 14 13 12 11 10 9 8 .255 .015* (6.477 0.381) 1 .300 - .325 (7.620 - 8.255) .130 .005 (3.302 0.127) .020 (0.508) MIN .008 - .015 (0.203 - 0.381) +.035 .325 -.015 .005 (0.125) .100 MIN (2.54) BSC 2 3 4 5 6 7 .045 - .065 (1.143 - 1.651) .065 (1.651) TYP .120 (3.048) MIN .018 .003 (0.457 0.076)
N14 1002
(
8.255
+0.889 -0.381
)
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
NOTE: 1. DIMENSIONS ARE
S Package 14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.045 .005 .050 BSC N 14 13 .337 - .344 (8.560 - 8.738) NOTE 3 12 11 10 9 8
.245 MIN
N .160 .005 .228 - .244 (5.791 - 6.197) 1 2 3 N/2 N/2 .150 - .157 (3.810 - 3.988) NOTE 3
.030 .005 TYP
RECOMMENDED SOLDER PAD LAYOUT 1 .010 - .020 x 45 (0.254 - 0.508) 2 3 4 5 6 7
.053 - .069 (1.346 - 1.752)
0 - 8 TYP
.008 - .010 (0.203 - 0.254)
.004 - .010 (0.101 - 0.254)
.016 - .050 (0.406 - 1.270)
NOTE: 1. DIMENSIONS IN
.014 - .019 (0.355 - 0.483) TYP
.050 (1.270) BSC
S14 0502
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
LW/TP 0103 1K REV D * PRINTED IN USA
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2001

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