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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

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Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of ...
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HTC 8X vs Nokia Lumia 920 vs Samsung ATIV S

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HTC 8X vs Nokia Lumia 920 vs Samsung ATIV S

Nokia Lumia 920

HTC 8X

Samsung ATIV S

 

Here comes the one table to rule them all ...right after the break.....



DESIGNHTC Windows Phone 8XNokia Lumia 920Samsung ATIV S
Dimensions5.21 x 2.61 x 0.40 (132.3 x 66.2 x 10.1 mm)5.13 x 2.79 x 0.42 (130.3 x 70.8 x 10.7 mm)5.40 x 2.78 x 0.34 (137.2 x 70.5 x 8.7 mm)
Weight4.59 oz (130 g)
the average is 4.2 oz (119 g)		6.53 oz (185 g)
the average is 4.2 oz (119 g)		4.76 oz (135 g)
the average is 4.2 oz (119 g)
ColorsBlack, Yellow, Blue, RedBlack, Yellow, Red, White, GrayBlack
DISPLAY


Physical size4.30 inches4.5 inches4.8 inches
Resolution720 x 1280 pixels768 x 1280 pixels720 x 1280 pixels
Pixel density
342 ppi332 ppi306 ppi
Technology
S-LCD 2IPS LCDSuper AMOLED
BATTERY


Capacity1800 mAh2000 mAh2300 mAh
TypeLi - PolymerLi - Ion (with wireless charging)Li - Ion
HARDWARE


System chip
Qualcomm Snapdragon S4 Plus MSM8960Qualcomm Snapdragon S4 Plus MSM8960Qualcomm Snapdragon S4 Plus MSM8960
Processor
Dual core, 1500 MHz, KraitDual core, 1500 MHz, KraitDual core, 1500 MHz, Krait
Graphics processorAdreno 225Adreno 225Adreno 225
System memory
1024 MB RAM (Dual-channel) / LPDDR2 (500 MHz)1024 MB RAM (Dual-channel) / LPDDR2 (500 MHz)1024 MB RAM (Dual-channel) / DDR2 (500 MHz)
Built-in storage16 GB32 GB16 GB
Storage expansion no nomicroSD, microSDHC, microSDXC
CAMERA


Camera8 megapixels, Immobile8.7 megapixels, Immobile8 megapixels, Immobile
FlashLEDDual LEDLED
Aperture sizeF2.0F2.0
Focal length (35mm equivalent)28mm26mm
FeaturesBack-illuminated sensor (BSI), Auto focus, Geo taggingBack-illuminated sensor (BSI), Auto focus, Touch to focus, Optical image stabilization, Exposure compensation, White balance presets, Digital zoom, Geo taggingAuto focus, Geo tagging
Camcorder1920x1080 (1080p HD)1920x1080 (1080p HD) (30 fps)1920x1080 (1080p HD)
Recording format
MPEG4, H.264
FeaturesVideo callingVideo calling, Optical image stabilizationVideo calling
Front-facing camera2 megapixels1.3 megapixels1.9 megapixels
Video capture  1920x1080 (1080p HD)1280x720 (720p HD) (30 fps) yes
TECHNOLOGY


CDMA
800, 1900 MHz

GSM850, 900, 1800, 1900 MHz850, 900, 1800, 1900 MHz850, 900, 1800, 1900 MHz
UMTS800, 850, 900, 1700/2100, 1900, 2100 MHz850, 900, 1900, 2100 MHz850, 900, 1900, 2100 MHz
LTE
800 MHz, 900 MHz, 1800 MHz, 2100 MHz, 2600 MHz
DataLTE Cat3 Downlink 100 Mbit/s, LTE Cat3/4 Uplink 50 Mbit/s, LTE, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS, EDGE, GPRS, EV-DO Rev.ALTE Cat3 Downlink 100 Mbit/s, LTE Cat3/4 Uplink 50 Mbit/s, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS, EDGE, GPRSHSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s,
 UMTS, EDGE, GPRS
Micro SIMYesYes
Global RoamingYesYesYes
Positioning
GPS, A-GPS, GlonassGPS, A-GPS, S-GPS, Glonass, Cell ID, Wi-Fi positioningA-GPS, Glonas
NavigationTurn-by-turn navigationTurn-by-turn navigation, Voice navigationYes


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