Showing papers on "Mixed-signal integrated circuit published in 1980"

Built-in test for complex digital integrated circuits

Abstract: A method for testing the logic function of complex digital integrated circuits is presented. The extra hardware needed is kept minimal by functional conversion of already existing components (e.g., registers). The feasibility of the proposed method is demonstrated by results from both hardware simulation and logic simulation. The method is based on an adapted version of signature analysis, and on circuit partitioning (the structure of VLSI circuits is assumed to be inherently modular).

Programmable semiconductor integrated circuitry including a programming semiconductor element

Abstract: A programmable semiconductor integrated circuitry including a circuit programming element is disclosed. The circuit programming element can be activated in a short-circuit mode by the irradiation of a laser or electron beam or by ion implantation so that it is converted from its original nonconductive state into a conductive or conductable state, thereby providing electrical connection between circuits and/or circuit elements of the integrated circuitry for a desired circuit programming such as circuit creation, circuit conversion or circuit substitution.

Differential to single-ended converter utilizing inverted transistors

Abstract: A differential to single-ended converter circuit is disclosed which utilizes integrated injection logic device geometrics to significantly reduce the area required to fabricate the converter within an integrated circuit. Inverted transistor operation and multiple collector output terminals allow the converter circuit to directly drive integrated injection logic circuitry which may be fabricated within the same integrated circuit chip. When used in conjunction with a voltage comparator circuit, the differential to single-ended converter circuit maintains the offset associated with the comparator circuit at a minimum despite variations in operating temperature and variations in integrated circuit processing.

Design of Self-Checking MOS-LSI Circuits: Application to a Four-Bit Microprocessor

Abstract: Self-checking approaches developed so far deal with a gate level representation of logical circuits. They do not account for constraints which may result from an implementation by integrated circuits. This paper is concerned with such practical problems and their respective significance.

Analog signal processing and instrumentation

Abstract: Integrated circuits have revolutionised design electronics. This new paperback edition of Professor Arbel's text for electronic systems designers treats integrated circuits as black boxes whose properties are specified by the manufacturer and shows bow to design circuits that make the best use of them. This approach enables the designer to concentrate on the best way of using the circuit modules. A most valuable feature of the book is the presence of many practical problems together with their solutions. There is also a bibliography.

An eight-channel 8 bit microprocessor compatible NMOS D/A converter with programmable scaling

Abstract: A single-chip multiple-channel D/A converter is described. The NMOS chip contains a combination of digital and analog functions. Eight output channels with 8 bit accuracy are provided and each channel has programmable end points. The values for the data and the end points are stored in an internal RAM. Sample and-hold functions are completely on-chip. Only one multiplexed opamp is required for the analog functions. The entire control logic is incorporated in an easily testable PLA. The active chip area is 8 mm/SUP 2/. There are three power supplies (15,5,-5) with a total power dissipation of 120 mW. Updating of the eight channels occurs at a 16 kHz rate (5 MHz clock). The circuit aims at applications in microprocessor driven control systems in the industrial and consumer products field.

An 8-bit, 5 ns monolithic D/A converter subsystem

Abstract: Describes a 5 ns settling time digital-to-analog converter device, which has been designed for use in video speed successive approximation analog to digital converters. The chip includes a precision reference source with a 25 ppm per degree C average temperature coefficient and a high-speed comparator. The successive approximation approach, restricted to low-speed converters until now, has the advantages of low cost and straightforward drive requirements. The achievement of the operating speeds described is dependent both on the circuit techniques used and the process employed. The DAC circuit, unlike most other devices, uses a multiple-matched current source array technique, which leads to a very linear, low glitch output. Without any form of trimming, most functional devices meet a /spl plusmn//SUP 1///SUB 2/ LSB differential and integral linearity specification, and many are /spl plusmn//SUP 1///SUB 4/ LSB or better.

Digital control circuit for an analog servo

Abstract: This disclosure describes digital control circuit to actuate an analog servo motor in response to digital information from a computer The control circuit is responsive to the timing signal (13) from the computer, and includes a circuit (12) to receive information from the computer indicative of a new servo position A feedback circuit (15) receives information from the servo indicative of the actual present servo position Information processed individually by each of these circuits then is connected into a computational network (14) in order to generate a properly timed digital output signal which, when converted in a suitable digital-to-analog converter (17), is able to drive a servo motor accurately

Micropower IC

Abstract: Various aspects of the realization of micropower LSI circuits are discussed, from the requirements on CMOS technologies to constraints on systems. Available passive and active devices are reviewed, with emphasis on DC, AC and noise characteristics of transistors at very low currents. Problems and solutions encountered in digital and analog circuits are illustrated with a few examples.

A complete single-supply microprocessor-compatible 8-bit DAC

Abstract: A functionally complete, microprocessor-compatible digital-to-analog converter which operates on a single +5 V supply is described. This monolithic bipolar chip is fabricated using a linear compatible I/SUP 2/L process and contains both a precision reference and a voltage output buffer, along with the DAC and input logic. Laser wafer trimming of on-chip thin-film resistors is used to guarantee output response linearity as well as the absolute calibration of end points. The new circuit techniques which were developed to allow low-voltage single-supply operation with no sacrifice in performance are described and analyzed in detail.

A versatile bipolar monolithic 6-bit A/D converter for 100 MHz sample frequency

Abstract: An A/D converter was developed which uses a parallel conversion technique and is designed for manufacture with an ASBC process. The converter SDA 5010 is suitable for a wide range of applications because of its high-conversion rate, its low-power dissipation of 450 mW, large analog input range of up to /spl plusmn/2.5 V, and an overflow output for systems where a higher accuracy than 6 bits is required.

A Base-Band Comb Filter for Consumer Television Receivers

Abstract: Since the inception of color TV twenty-five years ago, there has been a continual improvement in the performance and features available in consumer television receivers. Advancements in circuit and device technologies have made their way from the research laboratories into consumer products as economics has permitted. So it is that now the circuit techniques of comb filtering, which have been known for decades, have become viable in consumer TV through the recent advancements in charge coupled devices and in MOS integrated circuits. These technologies can now be married with TV circuit designs to open new realms of picture resolution, freedom from interference between the luminance and chrominance signals and a new dimension of picture sharpness through the addition of vertical detail enhancement.

A high-speed NMOS A/D converter with a current source array

Abstract: A high-speed MOS analog-to-digital (A/D) converter has been designed and fabricated in a standard single channel metal-gate enhancement/depletion MOS process. The use of current switching performs a conversion time of 13.2 /spl mu/s at a resolution of 8 bits. To replace the resistance ladder a binary weighted current source array has been implemented which consists of MOS transistors. The test circuit requires 4 mm/SUP 2/ including all analog circuit functions without the successive approximation register.

Solid state: VLSI with a vengeance: The Pentagon's very-high-speed integrated circuits project requires revolutionary advances in systems and IC technology

Abstract: Discusses the Pentagon's very-high-speed integrated circuits project which requires revolutionary advances in systems and IC technology. The VHSIC program was initiated to develop VLSI signal processors with several hundred times higher speed and computing power than today's LSI devices. The planned processors must also consume less power and be smaller and more reliable. They are for use in military applications with no counterparts in commerce or industry-mainly real-time signal processors for weapons systems of the next decade. The goal of the program is pilot production in 1986 of processors containing 250000 gates, operating at clock speeds of at least 25 MHz, and performing several million to several billion operations per second. The gates would be fabricated by MOS or bipolar technology and have minimum dimensions of 0.5 to 0.8 μm. The required speed and circuit density would be obtained both by scaling down current LSI circuits-proportionately reducing such basic parameters as channel length, oxide thickness, and supply voltage-and by developing new types of system architecture and software.

Design and implementation of three-valued logic systems with M.O.S. integrated circuits

Abstract: A method of design of three-valued logic circuits which reduces the need for complementary pairs of m.o.s. integrated circuits is presented. Circuits of basic ternary operators (inverters, NAND and NOR) are utilising single m.o.s. transistors. Based on these ternary operators it is possible to design simpler and cheaper three-valued logic systems. As examples, the construction of the Jk arithmetic circuit and the T-gate are described.

A Microcomputer-Controlled Testing System for Digital Integrated Circuits

Abstract: This paper describes a low-cost digital integrated circuit (IC) tester designed and implemented using the Intel 8080 microcomputer family. Test patterns are applied to each IC to be tested from a lookup table stored in memory, along with appropriate clock signals if needed. The resulting chip outputs are then examined for errors resulting from stuck-at conditions or other functional errors. The hardware and software structure are presented as well as experimental results obtained in actual system applications.

A precision autozeroing sample and hold integrated circuit

Abstract: A precision sample and hold integrated circuit with autozeroing of all DC errors is described. Experimental data have shown that it provides the accuracy necessary for use in 12 bit data acquisition systems. Application of noise-optimized silicon gate FET devices for the input circuitry of amplifiers which buffer the hold capacitor results in a low droop rate and allows the sample/hold to operate without external components. Common mode rejection is optimized through implementation of a modified current source offering extremely high output impedance at high operating currents. The device includes all digital control and switching circuitry.

Monolithic components for 100 MHz data conversion [4-bit expandable A/D convertor]

Abstract: Describes a 4 bit expandable analog to digital converter capable of operation at clock rates of over 100 MHz in 8 bit systems under Nyquist limit sampling conditions. Essential to these high speeds are a fast (>5 GHz F/SUB T/) bipolar process and a design approach which takes every advantage of the components available.

The Challenge of the VLSI Technique to Telecommunications Systems

Abstract: The rapid evolution from the transistor to the LSI circuit revolutionized telecommunications systems. In particular, the low-cost IC's triggered the transition from wired- to stored-program control and from analog to digital techniques by introducing standard IC's as micro-processors, memories, etc. The availability of analog-digital interface circuits, for example codecs, filters, SLIC's, and vocoders, has become very important. In addition to the technical revolution, the economical aspects must be considered. LSI circuits enter more and more into the vicious circle of greater complexity-fewer applications and thus higher costs. An escape from this circle is offered by programmable circuits such as microprocessors or new circuits with a regular architecture. Nevertheless, custom circuits will always be used in order to protect the system know-how. The blend of standard and custom circuits will be important for the success of a systems house. Since vertical integration activities will be unlikely, different concepts of cooperation between IC manufacturers and system house become more and more important.

A GaAs MESFET sample and hold switch [for video A/D conversion]

Abstract: A monolithic GaAs MESFET sample and hold switch has been designed, primarily as a research vehicle for GaAs linear integrated circuit technology A novel FET-ring circuit configuration has been used in order to overcome the problems associated with switch drive in more conventional circuits

Integrated circuit for a time-piece

Abstract: An integrated circuit for a time-piece including an oscillator, a frequency divider, an electronic circuit for effecting at least one auxiliary function depending on information delivered to the inputs thereof, a circuit for controlling a display and a circuit for setting the time. The integrated circuit is provided with a first group of terminals for enabling connection of the integrated circuit with external components such as a piezo-electric resonator, the display, and the time-setting circuit.

Control device for aircraft engine

Abstract: PURPOSE: To permit the high accurate and high reliable control by a digital electronic control device which comprises a monitoring circuit for electric and hydraulic systems adapted to detect troubles of a microcomputer for the respective control systems, a mutual transmission circuit between both the electric and hydraulic systems and so. CONSTITUTION: This control device comprises a first system including an input signal processing circuit 1, No.1DEC (digital electronic control device) 3 and an output circuit 11, a second system including an input signal processing circuit 2, No.2 DEC4 and an output circuit 12, and parts common to both the systems. The common parts comprise a bi-directional memory 5 having such a function as to exhange informations between both the DEC's 3, 4 synchronous monitoring control circuit 6, electric system monitoring control circuits 7, 8, hydraulic switching system monitoring control circuits 8, and a switching circuit 10. The respective DEC's 3, 4 receive a signal A from various sensors 17 mounted on an engine body 16 and a signal B from a fleight Machmeter through mutual transmission circuits 19, 20. Thus, if becomes also able to detect troubles of the sensor 17 as early as possible. COPYRIGHT: (C)1982,JPO&Japio

Push-pull optical detector integrated circuit

Abstract: This paper presents the design of a push-pull photodetector IC developed for optical encoder applications. The IC features independence of LED brightness, temperature-independent hysteresis, and analog and digital outputs. The circuit uses a nonlinear signal processing scheme which takes special advantage of monolithic construction.

A fast, latching comparator for 12 bit A/D applications

Abstract: High-speed, 12 bit accurate successive approximation A/D converters demand a comparator with both excellent input specifications and fast response time The author describes a voltage comparator with 50 ns response time to 1/2 LSB overdrive (12 mV) and 01 LSB (250 /spl mu/V) total input error Unique features of the circuit include a super-/spl beta/ input stage, a fast buried-zener level-shift, a fully differential output stage, a floating-zener biasing scheme, and a fast latch circuit which does not interfere with input accuracy The comparator is manufactured on a bipolar, double-implanted, thin epi, junction-isolated process

Integrated Circuit Applications

Abstract: The worldwide sales of integrated circuits (ICs) exceeded sales of discrete semiconductor devices in 1977 by a considerable margin (the figures being $3.5 billion and $3 billion, respectively). About $1.8 billion was spent for MOS ICs and the balance for bipolar circuits. About $750 million of the total was for circuits classified as linear rather than digital. This chapter begins with a discussion of linear circuit applications.

Digital to analog converter having an analog to digital converter portion for an AC operation or a DC operation

Abstract: A digital to analog converter is provided, for making a digital to analog conversion, and including, an analog to digital converter portion which may be an existing converter, an arithmetic logic unit which is coupled to the analog to digital converter portion, a digital to dc converter portion which is coupled to the arithmetic logic unit, an ac multiplex circuit for an ac operation which is adapted to be coupled to the digital to dc converter portion, a dc multiplex circuit for a dc operation which is adapted to be coupled to the digital to dc converter portion, a switch which couples either the ac multiplex circuit or the dc multiplex circuit to the digital to dc converter portion and which is coupled to and operated by the arithmetic logic unit, and a multiplex control which is actuated by the analog to digital converter portion and which is coupled to the ac multiplex circuit and to the dc multiplex circuit for controlling the output signals from the ac circuit and dc circuit to the analog to digital converter portion.

The BCML Circuit and Packaging System

Abstract: A circuit and packaging system for integrated circuits is described. The interrelation between the locical, electrical, mechanical, and thermal interfaces is shown. The leverage which system definition can bring to bear on performance, maintainability, and manufacturability is explored.

A serial digital-to-analog converter for nonlinear input-output relationships

Abstract: A new digital-to-analog converter (DAC) is presented for applications when the input-output variation is nonlinear. This serial DAC consists of the Shannon-Rack Decoder and some other circuits. Many types of nonlinearity may be realized in the method proposed here.