CMOS Image Sensor IP License
CMOS Image Sensor IP
| IP Product |
Contents | Format | bit |
Max Trans Time |
Column Power Current |
Column Pitch (m) |
Analog Digital Power Voltage |
Spec | Supply Status(nm) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 65 | 90 | 130 | 180 | ||||||||||||
| J | T | J | T | U | U | J | |||||||||
| CI00201 | Column A/D Converter |
W-SA | 12bit | 3.75uS (2.75uS) |
15uW | 5.6um 2.8um x2 |
3/1.8V 1.8V |
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| CI00101 | Column A/D Converter |
Warp & Walk |
14bit | 30uS | 20uW | About 7um | 3.3/1.8V 1.8V |
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| CI00001 | Low Power SenseAMP |
Current Detect |
- | 250MHz more |
50uA | - | 1.8V Untill 1.0V |
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CMOS Image Sensor Interface IP
Other CMOS Image Sensor IP
| IP content | Explain |
|---|---|
| Column Amplifier | The circuit composition which coped with each of the one for column A/D converter and global A/D converter. |
| Low Power Counter-Driver & Latch Circuits |
The circuit composition that the latch circuit which is necessary for the integrating A/D converter, and driver of gray-code counter data can be low power. It is especially effective when it is high-speed clock. |
| Ramp Generator Circuits | With the electric current switch type D/A converter format, together, a small area circuit by switched capaciter type. Both can cope with slope valiability. |
| Analog OB Clamp Circuits | The analog OB clamp circuit of the adjusting feedback type an OB pixel signal to the constant level for the format of each column A/D type and global A/D type. |
Original algorithm Proposal of New Type Column ADC
Introduction
It is an analog output for the customer that its company is developed as for the commodity that applies CIS (CMOS image sensor) A digital signal of CIS and latter part is processed ISP Isn't Interface a problem of racking one's brains?
Analog Front End?The circuit to be said is one of the very difficult circuits. The load is heavy to develop its company, and unavoidably There might be a case said that cannot help making AFE Chip external, commercializing or it giving up the product development in it because the miniaturization is difficult, too.
Our company was this The custom of an analog circuit As the beginning, it highly accurate of original our company it was high-speed it aimed supplying it to the customer as IP "ASIP" (*1) The development of Column/Parallel ADC began.
By making minutely The processing performance of ISP improves rapidly, and there is a possibility that the output speed of age [dega] and CIS that the application that has not been thought up to now is possible becomes a bottleneck.
The Column/Parallel method made it on a chip by the method that is appropriate for a high-speed reading CIS was adopted, a high-speed taking picture was achieved, and there is an example of the success in the differentiation of the digital camera, too. Our company Column/Parallel ADC can satisfy the demand of the customer who can unite speed-up to making to high resolution by an original "Warp & Wlak" algorithm, and is examining the application of such high-speed signal processing.
The custom that all customers can be satisfied It must aim supplying IP, and, first, the voice must feel free to disregard if it is interested.
(* 1: It is our coinage, and it means Application Specified Intellectual Property. )
Outline of this method
High speed and high accuracy
Speed-up and making to high accuracy are one by one united by simultaneous using the comparison method and the Single-Slope method.
The high rank Digiize is one by one done at high speed by comparison method (=Warp), and subordinate position afterwards Digitize "Warp&Walk Algorithm" done in high accuracy by Single-Slope method (=Walk)
“Fine Calibration Technique" to minimize error margin of cooking stove switch of high rank and subordinate position
Layout size minimization
The circuit element necessary for Column ADC is reduced by doing as not the comparison method one by one and the charge redistribution type of DAC used but the voltage selection type.
It is individual Because it is possible to compose, make it minutely only with the transistor almost the time of Column road Pitch Shrink is easy, and the pixel size is small can the adjustment also to CIS and height ..Sensor Noise.. by [inpuri] of S/N "Double CDS" the peculiarity to Column FPN is minimized.
It remains with Analog CDS Clamp Error In the operation of the subtraction "Single-Slope" as "Multi-Slope" with Digitial Domain, it is Averaging Random Noise can decrease.
Aplication Flexible drive according to Operation Mode
Application example
*Serial Interface in accordance doesn't limit it to Multi-PHY ( DPHY & sub-LVDS(DDR) & SMIA CCP2 ).
*MIPI D-PHY, SMIA-CCP2, sub-LVDS, LVDS, and MDDI, etc. can correspond flexibly.