參數(shù)資料
型號(hào)： FTF1100MF1
廠商： INFINEON TECHNOLOGIES AG
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, XMA
文件頁數(shù)： 39/39頁
文件大?。?/td> 400K
代理商： FTF1100MF1
FingerTIP
Infineon Technologies
9/38
FTF 1100 MF1 V2.0 databook 3.3 (05.00)
+
-
SW1
SW 2
integrating
capacitor
finger
surface
comparator
Cp
Vref
Cc
VCC
$00 ... $FF
COUNTER
STOP
Figure 2: FingerTIP: Capacitive Measurement Technique
In each charge cycle one line with 224 pixels is acquired. These 224 8-bit values are first
stored in the line register. In a second step the data is transferred to the shift register. The
output lines of the shift register are connected to the data switch and the parallel to serial
converter. Depending on the selected mode – EPP or SPI – the DATA switch unit
connects the corresponding input line to the output line (EPP: parallel output, SPI: serial
output). While the values are being transferred from the shift register to the output unit, the
next line is evaluated. Once the shift register has output all the 224 bytes, a 225
th byte with
the value 00h is added to signal the line end. When all the lines are output the FingerTIP
continues to output a sequence of 225 bytes (224 x FFh and 1 x 00h).
2.3 Dynamics of the Sensor
The FingerTIP provides an 8-bit representation of the gray levels for each pixel. In terms
of image processing, the value 0 represents black and the value 255 white. In reality, the
gray level representation of a fingerprint will be limited by the so called water line and air
line as shown in the schematic histogram (figure 3).
Figure 3: Schematic Histogram of the FingerTIP
frequency of
occurrence
air line
(finger valley)
water line
(finger ridge)
Dynamics of the Sensor
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FTF1100MF1V2.0 制造商:Rochester Electronics LLC 功能描述:- Bulk
FTF1100MF1V2.1 制造商:Rochester Electronics LLC 功能描述:- Bulk
FTF3020-C 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor
FTF3020-C/EG 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor
FTF3020-C/HG 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full Frame CCD Image Sensor
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