This paper describes how an automatic test program generation environment is developed by making use of the Summit design's TDS software modules as the basic building blocks. A new design-to-test process flow is d...
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This paper describes how an automatic test program generation environment is developed by making use of the Summit design's TDS software modules as the basic building blocks. A new design-to-test process flow is defined. A solution of eliminating conversion errors of simulation post-processing is also proposed. In this approach, a functional test program can be generated within minutes, which dramatically shortens the test program development time and gets a new product faster to market.
A low voltage precision peak detector for current signals is presented. It detects a positive peak current and holds accurately the detected current even in the presence of large negative current peaks. Peak detection...
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A low voltage precision peak detector for current signals is presented. It detects a positive peak current and holds accurately the detected current even in the presence of large negative current peaks. Peak detection of a 500 kHz signal within 3% is possible in a dynamic range of 40 dB with a 2 V supply voltage and over 60 dB with a 5 V supply voltage. Additional circuitry is also designed to achieve a signal independent and adjustable discharge time constant.
In this paper the author presents an improvement to the previously proposed design technique for 2-channel, causal stable IIR perfect reconstruction filter banks. The technique is based on transformations of variables...
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In this paper the author presents an improvement to the previously proposed design technique for 2-channel, causal stable IIR perfect reconstruction filter banks. The technique is based on transformations of variables. Previously, the transformation functions used were all-pass but this yielded subband filters with fairly large overshoot in its frequency response. By relaxing the requirement of using all-pass transformation functions, filters with improved response (lower and no overshoot) are achievable.
We discuss an efficient algorithm for solving 2-dimensional circuits based on a multi-conductor theorem. There have been many papers published about transmission lines, because they are very important for design of hi...
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We discuss an efficient algorithm for solving 2-dimensional circuits based on a multi-conductor theorem. There have been many papers published about transmission lines, because they are very important for design of high speed VLSI chips. On the other hand, a device simulation is also very important to design ICs and to understand the qualitative behaviour. Most of the simulation techniques are based on the finite-difference time-domain method, where the devices are described by many discrete models. This is really time-consuming because, to get exact solution, the device must be divided into many sections. In this paper, we show an elegant algorithm for solving 2-dimensional circuits, which can be applied to the device simulations.
A novel design approach for high frequency analogue micropower filters employing weakly inverted MOSFETs is presented. By vertically connecting integrators instead of the classical horizontal cascade, filter topologie...
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A novel design approach for high frequency analogue micropower filters employing weakly inverted MOSFETs is presented. By vertically connecting integrators instead of the classical horizontal cascade, filter topologies can be realised with extremely low power, and high frequency performance. To support the concepts, a 60 nW, 100 kHz biquad low-pass filter is designed with 1.8 V supply voltage. Also, a 112 nW, 100 kHz fourth-order Chebyshev coupled-biquad low-pass filter is also designed with 2 V supply voltage. Simulation results using a 0.8 /spl mu/m CMOS process confirm the design.
This paper presents an efficient multiple exchange algorithm for the frequency domain design of digital FIR filters with arbitrary magnitude and phase responses. The designed filters minimize the L/sub 2/ norm of the ...
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This paper presents an efficient multiple exchange algorithm for the frequency domain design of digital FIR filters with arbitrary magnitude and phase responses. The designed filters minimize the L/sub 2/ norm of the weighted complex frequency domain error function subject to constraints on the resulting magnitude and phase errors. This general design criterion allows for an arbitrary trade-off between complex L/sub 2/ approximation and Chebyshev approximation of given magnitude and phase responses. The optimization problem is solved by iteratively solving small quadratic programs. These linearly constrained subproblems can be solved using robust standard software.
In this paper the discrete implementation of orthogonal multiwavelet transforms based on two scaling functions is discussed. In contrary to one scaling function (single-wavelets) using several scaling functions offers...
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In this paper the discrete implementation of orthogonal multiwavelet transforms based on two scaling functions is discussed. In contrary to one scaling function (single-wavelets) using several scaling functions offers degrees of freedom that can be used to design orthogonal and symmetric, compactly supported wavelets. The discrete implementation of these vector-valued transformations can be executed by a wavelet-like transform using different stages of the filterbank. How to design these particular stages of the filterbank is discussed in this paper. Alternatively, it is shown how to take advantage of the degrees of freedom in designing the two scaling functions in order to construct multiwavelet systems with identical stages.
A "Super-MOS" maximum output swing CMOS/BiCMOS cascode circuit for use as a basic building block of low-voltage small geometry integrated circuits (on the order of 1 micron and smaller) is described. The des...
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A "Super-MOS" maximum output swing CMOS/BiCMOS cascode circuit for use as a basic building block of low-voltage small geometry integrated circuits (on the order of 1 micron and smaller) is described. The described circuit provides a high output impedance and maximum output voltage swing capability. Its applications to a current mirroring circuit and to a VHF OTA are discussed.
Advanced digital CMOS technologies are poised to become an increasingly important manufacturing platform for mixed analog-digital integrated circuits. This requires that appropriate design methodologies are devised to...
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Advanced digital CMOS technologies are poised to become an increasingly important manufacturing platform for mixed analog-digital integrated circuits. This requires that appropriate design methodologies are devised to overcome the main problems facing the design of high performance analog cells. This paper presents an overview of some of those methodologies, giving special emphasis to combined analog and digital circuit solutions for the enhanced performance of the former with little extra cost of the latter. These are discussed in the practical examples of a self-calibrated 300 /spl mu/W, 40 MHz comparator achieving 1 mV resolution, a full 12-bit MOSFET-only /spl Delta//spl Sigma/ modulator, an alternative /spl Delta//spl Sigma/ modulator architecture with minimized analog content, and finally a low offset I/Q D/A interface system.
An optimum signal in the form of a linearly-increased frequency-hopped uniform pulse train is derived and analyzed. This signal possesses some good wideband ambiguity properties that are useful for many practical appl...
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An optimum signal in the form of a linearly-increased frequency-hopped uniform pulse train is derived and analyzed. This signal possesses some good wideband ambiguity properties that are useful for many practical applications. In this paper, the proposed signal is specifically used as the source input in the context of target localization in which time delay and Doppler stretch estimation based on the wideband ambiguity function are required. A significant improvement in terms of estimation accuracy is obtained.
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