Recent Progress in Rapid-Single-Flux-Quantum Circuits

We describe recent topics of rapid-single-flux-quantum (RSFQ) circuits. Much higher integration and higher-speed operation are required for commercializing the RSFQ circuits in any application. To satisfy this requirement, we measure several kinds of time fluctuations that possibly limit the integration level and operating speed, and introduce the flexible passive transmission line technology including a multicasting transmitter. In addition, we describe our ongoing applications. A multiple-detectors-system is expected to open a new application field of an RSFQ-based analog-to-digital converter and a digital signal processor. As for a microprocessor application, increased number of arithmetic logic units may be effective for enhancing the computing performances.

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Recent Progress in Rapid-Single-Flux-Quantum Circuits

Advances in Science and Technology - Science and Engineering of Novel Superconductors V ◽

10.4028/3-908158-03-6.180 ◽

2006 ◽

pp. 180-187

Author(s):

Akira Fujimaki ◽

Takahiro Yamada ◽

Masamitsu Tanaka ◽

Hiroyuki Akaike ◽

Nobuyuki Yoshikawa ◽

...

Keyword(s):

Recent Progress ◽

Quantum Circuits ◽

Flux Quantum ◽

Rapid Single Flux Quantum

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A niobium nitride-based analog to digital converter using rapid single flux quantum logic operating at 9.5 K

IEEE Transactions on Applied Superconductivity ◽

10.1109/77.291697 ◽

1994 ◽

Vol 4 (2) ◽

pp. 92-96 ◽

Cited By ~ 6

Author(s):

M. Radparvar

Keyword(s):

Quantum Logic ◽

Niobium Nitride ◽

Analog To Digital Converter ◽

Digital Converter ◽

Flux Quantum ◽

Analog To Digital ◽

Rapid Single Flux Quantum

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Recent progress of digital signal processor.

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.110.92 ◽

1990 ◽

Vol 110 (2) ◽

pp. 92-98

Author(s):

Yukou Mochida ◽

Rokuya Ishii ◽

Sadayasu Ono

Keyword(s):

Digital Signal Processor ◽

Recent Progress ◽

Digital Signal ◽

Signal Processor

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DSP-Based Control of Multi-Rail DC-DC Converter Systems with Non-Integer Switching Frequency Ratios

Iraqi Journal for Electrical And Electronic Engineering ◽

10.37917/ijeee.7.1.3 ◽

2011 ◽

Vol 7 (1) ◽

pp. 9-13

Author(s):

James Mooney ◽

Simon Effler ◽

Mark Halton ◽

Abdulhussain Mahdi

Keyword(s):

Digital Signal Processor ◽

Critical Factor ◽

Digital Signal ◽

Switching Frequency ◽

Control Logic ◽

Multiple Control ◽

Analog To Digital ◽

Improved Performance ◽

The Individual ◽

Frequency Ratios

This paper examines the use of non-integer switching frequency ratios in digitally controlled DC-DC converters. In particular the execution of multiple control algorithms using a Digital Signal Processor (DSP) for this application is analyzed. The variation in delay from when the Analog to Digital Converter (ADC) samples the output voltage to when the duty cycle is updated is identified as a critical factor to be considered when implementing the digital control system. Fixing the delay to its maximum value is found to produce reasonable performance using a conventional DSP. A modification of the DSP’s interrupt control logic is proposed here that minimizes the delay and thereby yields improved performance compared with that given by a standard interrupt controller. Applying this technique to a multi-rail power supply system provides the designer with the flexibility to choose arbitrary switching frequencies for individual converters, thereby allowing optimization of the efficiency and performance of the individual converters.

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Low Noise EEG Amplifier Board for Low Cost Wearable BCI Devices

International Journal of Biomedical and Clinical Engineering ◽

10.4018/ijbce.2016070102 ◽

2016 ◽

Vol 5 (2) ◽

pp. 17-28

Author(s):

Ravim ◽

Suma K. V.

Keyword(s):

Noise Reduction ◽

Digital Signal Processor ◽

Low Cost ◽

Processing System ◽

Digital Signal ◽

Low Noise ◽

Digital Data ◽

Signal Processing System ◽

Analog To Digital ◽

Reduction Techniques

Designing a real-time BCI device requires an Electroencephalogram (EEG) acquisition system and a signal processing system to process that acquired data. EEG acquisition boards available in market are expensive and they are required to be connected to computer for any processing work. Various low cost Digital Signal Processor (DSP) boards available in market come with internal Analog to Digital converters and peripheral interfaces. The idea is to design a low cost EEG amplifier board that can be used with these commercially available DSP boards. The analog data from EEG amplifier can be converted to digital data by DSP board and sent to computer via an interface for algorithm development and further control operations. EEG amplifiers are highly affected by noise from environment. Proper noise reduction techniques are implemented and simulated in circuit design. Each filter stage and noise reduction circuit is evaluated for a low noise design.

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