Flash Analog to Digital Convertor (FADC) is frequently used in nuclear and particle physics experiments, often as the major component in big multi-channel systems. The large data volume makes the optimization of operating parameters necessary. This article reports a study of a method to extend the dynamic range of an 8-bit FADC from the nominal 2 value. By comparing the integrated pulse area wi...

Rev. 3 ■ Memories – 1K bytes single voltage Flash Program memory with read-out protection, In-Circuit and InApplication Programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention: 20 years at 55°C. – 128 bytes RAM. ■ Clock, Reset and Supply Management – 3-level low voltage supervisor (LVD) and auxiliary voltage detector (AVD) for safe poweron/off procedures – Clock sources: in...

The continued speed improvement of serial links and appearance of new communication technologies, such as ultra-wideband (UWB), have introduced increasing demands on the speed and power specifications of high-speed low-tomedium resolution analog-to-digital converters (ADCs).This paper presents the design of high speed and ultra low power comparator of a 4-bit ADC. The comparator used is Thresho...

In February 2007 the MAGIC Air Cherenkov Telescope for gamma ray astronomy was fully upgraded with a fast 2 GSamples/s digitization system. The upgraded readout system uses a novel fiberoptic multiplexing technique. It consists of 10-bit 2 GSamples/s FADCs to digitize 16 channels consecutively and optical fibers to delay the analog signals. A distributed data acquisition system using GBit Ether...

conclusion adc, fa, and t2* values may quantitatively reflect the microstructural characteristics of np, therefore they could be used to detect the minimal changes of early ldd. results the adc, fa, and t2* values were different (p < 0.05) among different rois within the same disc or among corresponding rois in different level discs. while the average values of adc increased regularly with the ...

background: early diagnosis of brain tumors has significant effect on the treatment process. brain metastatic tumors are usually diagnosed following the neurological symptoms in patients or incidentally after computerized tomography (ct) scan and magnetic resonance imaging (mri) requests of the brain. objectives: implementation of a new method for being informed about the origin of brain tumors...

A flash analog-to-digital converter, consisting of resonant-tunneling ternary quantizers and ternary-to-binary encoder circuits, is proposed. SPICE simulation exhibits a possible 10-GHz operation with reduced device counts and power dissipation, which are due to its compact circuit configuration.

We present a novel multiple-threshold circuit using resonant-tunneling diodes (RTDs). The logic operation is based on detecting a switching sequence in the RTD circuit. This scheme enables us to increase the number of threshold voltages by more than a factor of two compared with previous RTD-based MVL circuits. SPICE simulation shows that the circuit can operate at a clock frequency as high as ...

The overall performance of two-step flash A/D converters hinges on the second-stage fine comparator. This paper descibes the design of a 60 MHz fully differential comparator, intended for use in a 12-bit two-step flash converter. The comparator consists of four pre-amplifier stages followed by a regenerative latch. It uses a combination of output offset cancelation and input offset cancelation ...

One of the hurdles that prevent the wide acceptance of analog/mixed-signal design-for-test techniques is lack of a realistic and practical evaluation methodology. In this paper, a method to assess the quality of a design-for-test design (together with the associated test set) is proposed. Based on fabrication process variation information, our design-for-test evaluation criterion considers the ...