A Josephson ultrahigh-resolution sampling system

Tuckerman, David B.

doi:10.1063/1.91665

Cited by 56 publications

(9 citation statements)

References 3 publications

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“…A Josephson-junction (JJ) amplitude discriminator has been employed in an equivalent-time sampling system 10 ps [28], which demonstrated a time-domain reflectometer for the superconducting transmission-line elements employed in superconducting integrated circuits. The incident current step was produced by a JJ pulse generator, and all of the components were fabricated on a single substrate.…”

Section: B Equivalent-time Measurementsmentioning

confidence: 99%

“…Other sampling circuits using JJ's have been built [30], [31]. All of the measurements reported here [28] - [31 ] were applied to signals generated on chip in the cryogenic environment of 4.2 K.…”

Section: B Equivalent-time Measurementsmentioning

confidence: 99%

“…First, there is electron device research leading to faster or more versatile devices. The superconducting devices referred to in [28] -[311 will be improved and additional elements such as A/D converters, memories, etc., will be available [36], [37]. Another interesting class of devices are the proposed ballistic electron semiconductor devices [38] - [41 ] which are envisioned to possess submicrometer geometries in which electron velocities will be larger and responses faster.…”

Section: Remarks and Future Directionsmentioning

confidence: 99%

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Picosecond-Domain Waveform Measurement: Status and Future Directions

Nahman

1983

IEEE Trans. Instrum. Meas.

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A review of the state of the art of picosecond timedomain waveform measurements is presented which includes measurements in both the electrical and optical regions of the electromagnetic spectrum. This review is the latest edition of a series of reviews on high-speed pulse measurements compiled by the author commencing in 1967 [1]; specifically this review updates the 1978 review, [2]. The significance of the IEEE Pulse Standards 181 and 194 (or the identical IEC Standards 469-1 and 469-2) are discussed briefly. The classification of time-domain measurements from the 1978 review is summarized and augmented with basic instrumentation block diagrams. The advances in the present-day capabilities from those in 1978 are presented via temporal resolution state-of-the-art charts using the 1978 format; however, the only entries in the charts are those that have changed since 1978. Also, presented are some opinions as to the future directions of electrical and optical picosecond domain measurements. Fifty-six references are cited.

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Section: B Equivalent-time Measurementsmentioning

confidence: 99%

Section: B Equivalent-time Measurementsmentioning

confidence: 99%

Section: Remarks and Future Directionsmentioning

confidence: 99%

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Picosecond-Domain Waveform Measurement: Status and Future Directions

Nahman

1983

IEEE Trans. Instrum. Meas.

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“…A significant improvement to this technique was made by adding a Josephson pulse generator to strobe the signal [20], [21]. As shown in Fig.…”

Section: Josephson Series-array Designmentioning

confidence: 99%

Standards and high-speed instrumentation

et al. 1989

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“…Typically, these GHz-class GaAs MESFET and silicon bipolar integrated circuits have been part of high-speed (Gs/sec), moderate- In order to overcome these shortcomings, subsequent designs augmented the bias with a fast pulse generated by a Josephson pulser [25], [26], [27]. with clock lines fed through identical resistors (R., R 2 ), a common ground point between the junctions, and two transformers (Llab,L2a,b) connected in series across the junctions.…”

Section: -Track and Hold Circuitsmentioning

confidence: 99%

A Josephson-junction-bridge track-and-hold circuit

Tam

Sage²

1995

IEEE Trans. Appl. Supercond.

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A high-speed monolithic Josephson junction track and hold (T/H) circuit was designed, fabricated, and tested. The circuit consists of a novel Josephson junction bridge current switch and a superconducting hold inductor. The bridge, under the control of a commonmode clock current, modulates a balanced, differential input current. A two-junction Superconducting Quantum Interference Device (SQUID) in a flux-lock loop configuration serves as the readout circuit. The T/H was fabricated at MIT Lincoln Laboratory in the Dual-dielectric Selective Niobium Anodization Process (DSNAP) using conservative 5 gm minimum geometry and 1000 A/cm 2 critical current density. It was designed to be tolerant to a wide range of absolute critical current density, sheet resistance, and contact resistance rather than for optimum speed or resolution. The input signal range of the T/H is conservatively specified at +320 gA, and the output current is quantized in 20 gA steps, resulting in 5-bit dynamic range. Calculations and simulations of the T/H predict a 750 MHz analog tracking and sampling bandwidths, 4.6-bit effective dc resolution, an acquisition time of 725 ps, a 700 MS/s peak sampling rate, and an unlimited hold time. Measurements of the fabricated T/H show that it has 900 MHz analog tracking and sampling bandwidths, 4.5-bit effective dc resolution, and an acquisition time of 550 ps, commensurate with a 900 MS/s peak sampling rate.

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A Josephson ultrahigh-resolution sampling system

Cited by 56 publications

References 3 publications

Picosecond-Domain Waveform Measurement: Status and Future Directions

Picosecond-Domain Waveform Measurement: Status and Future Directions

Standards and high-speed instrumentation

A Josephson-junction-bridge track-and-hold circuit

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