A new 1.2 V BiCMOS log-domain integrator for companding current-mode filters

Punzenberger, M.; Enz, Christian

doi:10.1109/iscas.1996.539824

Cited by 56 publications

(24 citation statements)

References 4 publications

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“…The definition of the variables allows the reexpression of (10) and (13) in the form (15) When the currents are considered as known functions of the time , then (15) represents a system of coupled linear ordinary differential equations which rigorously describe the dynamic behavior of interconnected Bernoulli Cells. These equations can be considered as a "log-domain state-space," capable of describing and generating a multitude of linear (or nonlinear) responses.…”

Section: A Generic "Log-domain State-space"mentioning

confidence: 99%

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"Log-domain state-space": a systematic transistor-level approach for log-domain filtering

Drakakis

Payne

Toumazou

1999

IEEE Trans. Circuits Syst. II

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In this paper the properties of a low-level nonlinear continuous-time circuit element-termed a Bernoulli Cell (or Operator)-are described in a systematic way. This cell is composed of an npn BJT and an emitter-connected grounded capacitor, and is governed by a differential equation of the Bernoulli form. Although this cell has the potential for application in both linear and nonlinear analog signal processing, this paper will focus on the field of input-output linear log-domain filtering. The Bernoulli Cell can be utilized in both the analysis and synthesis of log-domain circuits. The Bernoulli Cell approach leads to the creation of a system of linear differential equations with timedependent coefficients and state variables nonlinearly related to currents internal to the circuit; this set of equations is termed "log-domain state-space," and can be used for the synthesis of linear log-domain filters. Four design examples-including a bandpass biquad-are presented.

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Section: A Generic "Log-domain State-space"mentioning

confidence: 99%

“…Publisher Item Identifier S 1057-7130(99) 01773-5. dynamic range under low power-supply voltages [9]- [15]. Furthermore, it has been shown that the exponential dependence of MOSFET's in weak-inversion is uniquely suited for log-domain micropower applications [16], [17].…”

Section: Introductionmentioning

confidence: 99%

"Log-domain state-space": a systematic transistor-level approach for log-domain filtering

Drakakis

Payne

Toumazou

1999

IEEE Trans. Circuits Syst. II

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“…5(b), to create a log-domain integrator which operates in class AB [8] with very low power consumption. Many log-domain circuits have been reported in the literature [3], [8], [9], [11], [12], [23]- [31]. ELIN integrators based on exponential internal nonlinearities can also be developed using the concept of the so-called "pseudoresistive" circuits [32].…”

Section: A Log-domain Circuitsmentioning

confidence: 99%

Externally linear integrators

Tsividis

1998

IEEE Trans. Circuits Syst. II

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“…The switch matrices provide interconnection among cells and the configuration switches configure the translinear cell, both by means of configuration memories. The MOS transistor in Fig 1 is an alternative to provide an emitterfollower connection forcing the collector current, using the Enz-Punzenberger (EP) configuration [18].…”

Section: Introductionmentioning

confidence: 99%

Translinear signal processing circuits in standard CMOS FPAA

Martínez-Alvarado

Madrenas

Fernandez

2009

2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)

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Abstract-In this paper, the implementation of signal processing circuits on a novel translinear Field-Programmable Analog Array (FPAA) testchip is reported. The FPAA testchip is based on a 0.35-micron, fully CMOS translinear element, which is the core block of a reconfigurable analog cell. The FPAA embeds a 5 × × × 5 cell array. As implementation examples, a four-quadrant multiplier with five decade dynamic range and a programmable fourth-order low-pass filter with up to 7 M Hz bandwidth have been mapped on the translinear FPAA. 14 cells have been used for the four-quadrant multiplier while 18 cells were needed for the fourth-order low-pass filter.

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A new 1.2 V BiCMOS log-domain integrator for companding current-mode filters

Cited by 56 publications

References 4 publications

"Log-domain state-space": a systematic transistor-level approach for log-domain filtering

"Log-domain state-space": a systematic transistor-level approach for log-domain filtering

Externally linear integrators

Translinear signal processing circuits in standard CMOS FPAA

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