Parallel Readout System Research Articles

CMOS-based high-speed nanopore recording: signals and systems.

This paper considers the potential of CMOS-based nanopore measurement systems for high-speed molecular recording and DNA sequencing in particular. As such it approximates the signal fidelity limitations of a CMOS-based nanopore readout channel and discusses the means by which throughput could be increased through the use of a parallel CMOS readout system.

Large area high temperature hard X-ray spectroscopy detectors for space experiments

High quantum efficiency, good energy resolution and room temperature operation make Cadmium Zinc Telluride (CZT) pixel detector an unique advantage for space experiments. We present here the results of two large area CZT detector systems; one with external ADC (Analog-to-Digital Converter) and high power Application-Specific Integrated Circuits (ASICs)(Ideas) having faster parallel readout system and the other with on-pixel ADC and low power ASICs (OrboTech) having slower serial readout system. We have studied background, energy resolution and detection efficiency of these detectors between 20 and 100keV. For Ideas detectors, large power dissipation in ASICs increases the detector temperature (upto 70°C) and the thermal background. This rise in temperature increases thermal noise sharply which drastically affects both the energy resolution as well as the detection efficiency. The low energy dissipation in OrboTech ASICs keeps the detector temperature low & constant, making thermal background stable. We find that OrboTech resolution & efficiency are far better than that of Ideas detector in spite of slower readout system. We further discuss the use of these detectors in space experiments.

MPRS: Medipix parallel readout system for angiography digital imaging

A fast readout system for the Medipix2 pixel chip has been developed for digital angiography applications to allow real time X-ray imaging of contrast media flowing in blood vessels. The readout system is designed to acquire data coming from the 32-bit Medipix2 parallel port of a maximum of eight chips at a rate of 25 frames per second. The readout electronics is peripheral component interconnect (PCI) bus-based and consists of two boards: the motherboard directly interfacing the chip for settings and data flow and the PCI board linking the motherboard to the bus. With parallel readout, a transfer rate of up to 64 MByte/s has been achieved.

Medipix2 parallel readout system

A fast parallel readout system based on a PCI board has been developed in the framework of the Medipix collaboration.11http://medipix.web.cern ch/MEDIPIX/The readout electronics consists of two boards: the motherboard directly interfacing the Medipix2 chip, and the PCI board with digital I/O ports 32 bits wide. The device driver and readout software have been developed at low level in Assembler to allow fast data transfer and image reconstruction.The parallel readout permits a transfer rate up to 64Mbytes/s.

The PASERO Project: parallel and serial readout systems for gas proportional synchrotron radiation X-ray detectors

A project aiming at producing more efficient position sensitive gas proportional detectors and readout systems is presented. An area detector with reduced electrode spacing and a spatial resolution of 0.5 mm and two time to digital convertors (TDC) based on ASICs were produced. The first TDC, intended for use with linear detectors, relies on time to space conversion, whereas the second one, for area detectors, uses a ring oscillator with a phase locked loop. A parallel readout system for multi-anode detectors aiming at a maximum count rate extensively uses RISC microcontrollers. An electronic simulator of linear detectors built for test purposes and a mechanical chopper used for attenuation of the X-ray beam are also briefly described.

Smart CMOS focal plane arrays: a Si CMOS detector array and sigma-delta analog-to-digital converter imaging system

This paper evaluates the potential for the real-time utilization of high frame rate image sequences using a fully parallel readout system. Multiple readout architectures for high frame rate imaging are compared. The application domain for a fully parallel readout system is identified, and the design for a fully parallel, monolithically integrated smart CMOS focal plane array is presented. This focal plane image processing chip, with an 8/spl times/8 array of Si CMOS detectors each of which have a dedicated on-chip current input first-order sigma-delta analog-to-digital converter front end, has been fabricated, and test results for uniformity and linearity are presented.

Motionless-head parallel-readout optical-disk system: experimental results

The motionless-head parallel-readout optical-disk system is designed to read out two-dimensional bit planes that are stored as one-dimensional Fourier-transform computer-generated holograms distributed radially on the disk active surface. Such a system, when built at full scale, could offer several potential advantages: high data-transfer rates of 1 Gbyte/s and higher, low access times of less than 15 ms, low retrieval times (the time required to read the entire memory) of less than 25 ms, and simple optical implementation. The experimental results of a scaled-down implementation of the system are presented.

Photonic content-addressable memory system that uses a parallel-readout optical disk

We describe a high-performance associative-memory system that can be implemented by means of an optical disk modified for parallel readout and a custom-designed silicon integrated circuit with parallel optical input. The system can achieve associative recall on 128 × 128 bit images and also on variable-size subimages. The system's behavior and performance are evaluated on the basis of experimental results on a motionless-head parallel-readout optical-disk system, logic simulations of the very-large-scale integrated chip, and a software emulation of the overall system.

Performance of double gap resistive plate counters with high gain non-flammable gases

We present the results of a test performed on double gap Resistive Plate Counters (RPC) operating with low percentage isobutane mixtures. The measured parameters will be compared to those obtained in the same cosmic rays test with RPC operating in standard gas mixture conditions. The detectors are equipped with a new 63 MHz parallel readout system optimized to handle RPC signals in accelerator physics environment.

The electronics and parallel readout system for the UA1 limited-streamer tubes muon detector

A muon position detector based on limited streamer tubes has been built for the UA1 experiment at the CERN p p collider. The tubes are arranged in chambers equipped with electronics to allow for analog readout of the induced signals on strips. The electronics module for charge amplification and conversion (STAR), the data acquisition system based on the VME standard and the performance of the detector will be described.