Applications And Architectures

The minimum system (see Fig. 5) consists of the back-end and front-end to readout a four channel IR detector or a CCD. If more bandwidth is required an additional link can be added. If more clocks/biases are needed or a synchronized readout of more than one or an additional/different detector must be performed this can accommodated by adding additional basic units (see Fig. 6).

Front-End

Front-End

Fiber Duplex Connection

Back-End

I Back-End PCI

RxTx ] FPGA

Figure 5. Minimum system.

Backplane

Front-End

Front-End

Basic

Module a

Signal Clock Bias

Fiber Duplex Connection

Back-End

Back-End PCI

Front-End

Basic

Module a

Signal Clock Bias

RxTx

RxTx

RxTx

Figure 6. Synchronized readout of detectors.

Multi-channel applications for mosaics of detectors are easy to accommodate by adding additional multi-channel modules with serial links.

Applications like interferometry or adaptive optics can be connected with high speed serial links. The big advantage is that data arrives with minimum latency directly at the processing node, the FPGA. The implemented Power PC's or dedicated DSP's have direct access to the data buffers containing the image data. The processing node can be located remotely and close to functions like deformable mirrors or others (see Fig. 7).

Serial Links On

B ackp lane

Front-End

Front-End

Basic

Module

Signal Clock Bias

Front-End AQ 32 CH

Fiber

Back-End

Back-End PCI

RxTx

RxTx

FPGA

Dedicated IF

A In

Adaptive Optics terferometry

FPGA

FPGA

Figure 7. Multi-channel system for special applications.

7. CONCLUSIONS

Advanced FPGA technology allows building low power and compact data acquisition systems for a wide range of applications like single detector or mosaic detector readout as well as different detectors: from the visible to the mid-infrared.

Veni, vidi, non vinci. Though he tried, Manfred Meyer has not been selected as spokesperson for Murgo Winery.

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