数据搜索系统,热门电子元器件搜索 |
|
CS7622-IQ 数据表(PDF) 9 Page - Cirrus Logic |
|
CS7622-IQ 数据表(HTML) 9 Page - Cirrus Logic |
9 / 36 page CS7622 DS322PP1 9 a fixed gain of 1x is selected, DOUT[12:3] is used as the output, a fixed gain of 2x will use DOUT[11:2], etc. In order to use this mode, the fixed gain register (14h) should be set and the cali- bration offset registers (OEh - 10h) should be set to 0. The CDS/VGA circuit is composed of three stages. The first stage has a fixed gain of 1, and the second and third stages have variable gain with a combined gain range of 1 to 8 (0-18 dB). Figure 8 shows a block diagram of the CDS/VGA circuit. The total gain is A = (C2/C3)(C4/C5) which is adjusted by varying C3 and C5. The capacitor Cb on the front of stage 1 is for black level adjustment and will be discussed in detail later. This circuit utilizes a two phase non-overlapping clock to perform the desired CDS function. The two phase clock also allows the video signal to be passed to the output while retaining a positive po- larity signal. Figure 9 shows a timing diagram of the two phase clock along with the CCD signal and output signals of stages one, two and three. There is an internal mid-scale DC bias level circuit at the input pin. This allows AC coupling into the CS7622 with a capacitor and having the input auto- VOUT (V) VIN (V) 1.0 0.5 0.25 0.125 1.07 0.5 1X 2X 4X 8X ADC OUTPUT 00 01 10 11 Figure 7. Transfer function of VGA circuit (assuming full scale level of 1.0 V) -A2 -A3 C2 C3 C4 C5 Φ1 Φ2 STAGE 2 STAGE 3 VOUT Vo1 -A1 C1 C1 Φ1 VIN ADC Vo2 STAGE 1 CONTROLS C3, C5 CONTROLS GAIN ADJUST BLOCK IN DIGITAL 2 Cb VREF Figure 8. Block diagram of CDS/VGA circuit 100 K Ω 100 K Ω |
类似零件编号 - CS7622-IQ |
|
类似说明 - CS7622-IQ |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |