Get Superior-Order Curvature-Correction Techniques for Voltage PDF

By Cosmin Radu Popa

ISBN-10: 1441904158

ISBN-13: 9781441904157

Superior-Order Curvature-Correction strategies for Voltage References is devoted to the research and layout of voltage reference circuits and evaluates enhancing their temperature habit by way of imposing superior-order curvature-correction innovations. the writer starts off with the examine of biasing present references with controllable temperature dependencies. that's by means of studying basic zero-order and first-order curvature-corrected voltage reference circuits which leads into the ultimate subject of the research of superior-order curvature-correction techniques.

The fabric contains a variety of simulations which validate the anticipated effects. now and again, the first-order research is done by means of the exam of second-order results that effect the circuits’ operation. Superior-Order Curvature-Correction options for Voltage References turns out to be useful for engineers and researchers within the zone of analog and mixed-signal CMOS VLSI design.

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3 First-Order Curvature-Corrected Current References 19 Fig. T / simulation for the circuit from Fig. 19 Fig. W=L/5 D 1:5; Fig. W=L/4 D 5; Fig. 22]. 20 1 Current References Fig. 57) is not fulfilled, the VM VN differential voltage (Fig. 22) has an important value, while the correct design (Fig. 21) minimizes the VM VN differential voltage. The nonzero value of this voltage is a consequence of secondorder effects, disregarded in the previous analysis. 4 PTAT2 Current References The utility of PTAT2 current references is correlated with the necessity of implementing superior-order curvature-corrections for improving the temperature behavior of current and voltage references.

1) EG0 (silicon bandgap energy), C, D, k, q, ˛, and  are constants with respect to temperature variations. 7) In the previous relation, it is possible to identify three terms: an independent temperature term, a term having linear negative temperature dependence, and a complex term, with a logarithmical dependence on temperature. 8) The evaluation of the temperature dependence of base–emitter voltage will be made using its expansion in Taylor series. T / function. The simulation of the base–emitter voltage temperature dependence is presented in Fig.

Because VDS1 D VGS1 > VGS1 VT , T1 transistor will operate in saturation and T3 will be also biased in the saturation region. Because VDS2 D VGS2 VGS1  VGS2 VT , T2 transistor is operating in the linear region. For determining the output voltage of threshold voltage extractor, VREF , it is necessary to originally find the expression of V voltage. 52) Solving for V, the second-order equation resulted from the system implemented by the previous three relations, one can obtain p V D 2I s s 1 1 C K1 K2 1 K1 !

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Superior-Order Curvature-Correction Techniques for Voltage References by Cosmin Radu Popa


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