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Translinear Circuits Using Subthreshold FloatingGate MOS Transistors
 Analog Integrated Circuits and Signal Processing
, 1996
"... . We describe a family of currentmode circuits with multiple inputs and multiple outputs whose output currents are products and/or quotients of powers of the input currents. These circuits are made up of multipleinput floatinggate MOS (FGMOS) transistors operating in the subthreshold regime. The ..."
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Cited by 37 (9 self)
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. We describe a family of currentmode circuits with multiple inputs and multiple outputs whose output currents are products and/or quotients of powers of the input currents. These circuits are made up of multipleinput floatinggate MOS (FGMOS) transistors operating in the subthreshold regime. The powers are set by capacitor ratios; hence, they can be quite accurate. We analyze the general family of such circuits and present experimental data from several members that we fabricated in a standard 2¯m doublepoly pwell process through MOSIS. 1. Introduction Information processing using analog VLSI systems has recently become the subject of much interest and active research [1], [2]. In particular, the currentmode approach is the focus of much attention [3]. In this paradigm, the quantities of interest are represented by currents, whereas the circuit voltages are thought of as playing only an incidental role. Among the vast array of nonlinear operations required to perform currentmod...
An RMSDC converter based on the dynamical translinear principle
 in Proc. ESSCIRC
, 1996
"... Translinear or logdomain #lters are theoretically exact realisations of linear di#erential equations. However, the dynamical translinear principle can also be applied to the implementation of nonlinear di#erential equations. In this paper, an RMSDC converter is proposed, comprising a direct imp ..."
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Cited by 7 (3 self)
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Translinear or logdomain #lters are theoretically exact realisations of linear di#erential equations. However, the dynamical translinear principle can also be applied to the implementation of nonlinear di#erential equations. In this paper, an RMSDC converter is proposed, comprising a direct implementation of the corresponding nonlinear di#erential equation by means of the dynamical translinear principle. Correct operation of the circuit was veri#ed through measurements. 1 Introduction The translinear principle #1# plays a key role in conventional implementations of RMStoDC conversion #2#. A wellknown RMSDC converter is shown in Fig. 1. The squarerdivider basically comprises a fourtransistor, i.e. secondorder #3#, translinear loop. As the squarerdivider facilitates onequadrant operation, its input signal is fullwave recti#ed. It calculates the current I 2 in =I out , where I out is the output current of the RMSDC converter and is equal to the mean value of I 2 in ...
On lowpower analog implementation of particle filters for target tracking
 In Proc. of EUSIPCO 2006
, 2006
"... We propose a lowpower, analog and mixedmode, implementation of particle filters. Lowpower analog implementation of nonlinear functions such as exponential and arctangent functions is done using multipleinput translinear element (MITE) networks. These nonlinear functions are used to calculate the ..."
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Cited by 5 (1 self)
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We propose a lowpower, analog and mixedmode, implementation of particle filters. Lowpower analog implementation of nonlinear functions such as exponential and arctangent functions is done using multipleinput translinear element (MITE) networks. These nonlinear functions are used to calculate the probability densities in the particle filter. A bearingsonly tracking problem is simulated to present the proposed lowpower implementation of the particle filter algorithm. 1.
Design Methodology for Analog VLSI Implementations of Error Control Decoders
, 2002
"... In order to reach the Shannon limit, researchers have found more efficient error control coding schemes. However, the computational complexity of such error control coding schemes is a barrier to implementing them. Recently, researchers have found that bioinspired analog network decoding is a good a ..."
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Cited by 4 (1 self)
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In order to reach the Shannon limit, researchers have found more efficient error control coding schemes. However, the computational complexity of such error control coding schemes is a barrier to implementing them. Recently, researchers have found that bioinspired analog network decoding is a good approach with better combined power/speed performance than its digital counterparts. However, the lack of CAD (computer aided design) tools makes the analog implementation quite time consuming and error prone. Meanwhile, the performance loss due to the nonidealities of the analog circuits has not been systematically analyzed. Also, how to organize analog circuits so that the nonideal effects are minimized has not been discussed. In designing
Analog Wavelet Transform Employing Dynamic Translinear Circuits for Cardiac Signal Characterization,” proc
 IEEE International Symposium on Circuits and Systems
, 2003
"... An analog QRS complex detection circuit, for pacemaker applications, based on the Wavelet Transform (WT) is presented. The system detects the wavelet modulus maxima of the QRS complex. It consists of a wavelet transform filter, an absolute value circuit, a peak detector and a comparator. In order to ..."
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Cited by 2 (2 self)
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An analog QRS complex detection circuit, for pacemaker applications, based on the Wavelet Transform (WT) is presented. The system detects the wavelet modulus maxima of the QRS complex. It consists of a wavelet transform filter, an absolute value circuit, a peak detector and a comparator. In order to achieve the lowpower requirement in pacemakers, we propose a new method for implementing the WT in an analog way by means of the Dynamic Translinear (DTL) circuit technique. Simulations indicate a good performance of the Wavelet Transform and the QRS complex detection. The resulting circuit operates from a 2V supply voltage, dissipates at most 55nW per scale and can be fully integrated.
Shortening the Analog Design Trajectory By Means of the Dynamic Translinear Principle
"... A promising new approach to shorten the design trajectory of analog integrated circuits without giving up functionality is formed by the class of dynamic translinear circuits. This paper presents a structured design method for this young, yet rapidly developing, circuit paradigm. As a design example ..."
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Cited by 2 (0 self)
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A promising new approach to shorten the design trajectory of analog integrated circuits without giving up functionality is formed by the class of dynamic translinear circuits. This paper presents a structured design method for this young, yet rapidly developing, circuit paradigm. As a design example, a 40¯A 2V dynamic translinear PLL, used as an FM demodulator, is presented. I. Introduction Electronics design can be considered to be the mapping of a set of mathematical functions onto silicon. For discretetime systems, of which the digital systems today are by far the most popular, this comes down to the implementation of a number of difference equations, whereas for continuoustime systems, often denoted by the term analog, differential equations are the starting points. In mixed analogdigital systems, the analog parts, however, often occupy less than ten percent of the complete, i.e., the mixed analogdigital circuitry, whereas their design trajectory is often substantially longe...
Synthesis of MultipleInput Translinear Element Networks
"... We describe two systematic procedures for synthesizing mutlipleinput translinear element (MITE) networks that produce an output current that is equal to product of a number of input currents, each of which is raised to an arbitrary rational power. By using the first procedure, we obtain a MITE netwo ..."
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Cited by 2 (2 self)
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We describe two systematic procedures for synthesizing mutlipleinput translinear element (MITE) networks that produce an output current that is equal to product of a number of input currents, each of which is raised to an arbitrary rational power. By using the first procedure, we obtain a MITE network, called a twolayer network, that is relatively insensitive to mismatch in the MITE weight values. By using the second procedure, we arrive at a MITE network, called a cascade network, that reduces the fanin required of each MITE. We illustrate each of these procedures with an example. 1. MITE NETWORKS: THE SYNTHESIS PROBLEM We recently introduced a class of translinear circuits, called multiple input translinear element (MITE) networks, that accurately embody productofpowerlaw relationships in the current signal domain [13]. The MITE is a circuit primitive that produces an output current that is exponential in a weighted sum of the MITE's input voltages [2, 4]. For a given produ...
Analysis and Synthesis of Static Translinear Circuits
, 2000
"... This report describes the class of static translinear circuits, which are capable of accurately implementing a wide range of static nonlinear relationships in the current signal domain, such as products, quotients, fixed powerlaw relationships, vector magnitude, and rational functions. After a brie ..."
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Cited by 2 (1 self)
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This report describes the class of static translinear circuits, which are capable of accurately implementing a wide range of static nonlinear relationships in the current signal domain, such as products, quotients, fixed powerlaw relationships, vector magnitude, and rational functions. After a brief historical account of the emergence of the class of translinear circuits, we examine the representation of information in translinear circuits and systems. Then, we describe the translinear principle and its application to the analysis and synthesis of translinearloop circuits, illustrating the processes with several example circuits. We then describe the operation and implementation of a translinearcircuit primitive called the multipleinput translinear element (MITE). From such elements, we build MITE networks, a class of lowvoltage translinear circuits that is equivalent to the class of translinearloop circuits. We describe intuitively the operation of MITE networks. We also describe how to analyze and synthesize such circuits, illustrating these processes with several example circuits.