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B.B. Bhattacharyya

Bio: B.B. Bhattacharyya is an academic researcher from Concordia University Wisconsin. The author has contributed to research in topics: Switched capacitor & Network synthesis filters. The author has an hindex of 2, co-authored 3 publications receiving 19 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a systematic method is presented for the generation and design of stray-insensitive switched capacitor (SC) biquads, where the parasitic insensitivity conditions reported earlier in the literature are exploited leading to the general switching scheme that guarantees stray insensitivity.
Abstract: A systematic method is presented for the generation and design of stray-insensitive switched capacitor (SC) biquads. To this end, the parasitic insensitivity conditions reported earlier in the literature are exploited leading to the general switching scheme that guarantees stray insensitivity. This scheme, in turn, yields the general configuration for a parasitic insensitive SC biquad. Then, following a systematic and exhaustive procedure, 23 new general biquads are obtained, some of which allow canonic designs. The 5 biquads reported so far in the literature are also derived in the process. All networks are input/output compatible with each other and, therefore, can be easily interconnected. Design equations are provided for all the circuits. Possibilities of design improvement using the new biquads are also indicated.

16 citations

Journal ArticleDOI
TL;DR: A new parasitic insensitive toggle-switched-capacitor scheme is presented and can be used to obtain a recently reported5 first-order inverting bilinearly transformed transfer function.
Abstract: A new parasitic insensitive toggle-switched-capacitor scheme is presented along with its applications to the synthesis of switched-capacitor networks. The scheme can be used to obtain a recently reported5 first-order inverting bilinearly transformed transfer function. The advantage of this technique is that, for the realisation of a lowpass filter, it requires only three capacitors and no matching conditions.

2 citations

Journal ArticleDOI
01 Dec 1987
TL;DR: In this paper, a technique for the optimisation of parasitic insensitive switched capacitor (SC) biquads is described, which minimizes the total capacitance and the component spread necessary for realising a 2nd-order transfer function by a parasitic insensitive SC network.
Abstract: A powerful technique is described for the optimisation of parasitic insensitive switched capacitor (SC) biquads. The proposed method minimises the total capacitance and the component spread necessary for realising a 2nd-order transfer function by a parasitic insensitive SC network. The increase in the network insensitivities due to the minimisation of the total capacitance is controlled by multiple criteria optimisation techniques. The method allows the optimisation to be performed with a variable network topology without, however, requiring large computational times. The number of components in the final network is limited and the dynamic range of the filter is also controlled. An example is given which demonstrates the possibility of considerable design improvement by using the proposed technique.

1 citations


Cited by
More filters
Book
15 Mar 2010
TL;DR: In this paper, a design approach based on a MOSFET model valid for all operating regions, rather than the standard square-law model, is presented, with numerous design examples and exercises also included.
Abstract: Covering the essentials of analog circuit design, this book takes a unique design approach based on a MOSFET model valid for all operating regions, rather than the standard square-law model. Opening chapters focus on device modeling, integrated circuit technology, and layout, whilst later chapters go on to cover noise and mismatch, and analysis and design of the basic building blocks of analog circuits, such as current mirrors, voltage references, voltage amplifiers, and operational amplifiers. An introduction to continuous-time filters is also provided, as are the basic principles of sampled-data circuits, especially switched-capacitor circuits. The final chapter then reviews MOSFET models and describes techniques to extract design parameters. With numerous design examples and exercises also included, this is ideal for students taking analog CMOS design courses and also for circuit designers who need to shorten the design cycle.

99 citations

Journal ArticleDOI
TL;DR: In this article, a pole-sharing technique was used for implementing bandpass filter banks using the non-minimum-phase Lerner approximation without placing additional speed requirements on the operational amplifiers and without resorting to complicated clocking strategies; only a biphasic clock was used.
Abstract: A pole-sharing technique was used for implementing bandpass filter banks using the nonminimum-phase Lerner approximation without placing additional speed requirements on the operational amplifiers and without resorting to complicated clocking strategies; only a biphasic clock was used. Substantial hardware saving has been achieved. The filter synthesis is shown to be micropower-compatible and parasitic-insensitive; phase reversal was easily accommodated while retaining all desirable features. A uniformly and nonuniformly spaced filter bank for typical speech applications have been simulated with SWITCAP and three channels of the uniformly spaced filter bank have been constructed on a breadboard using discrete components. The results obtained agreed with design specifications, yielding a good approximation to linear phase in the passband and sharp attenuation in the stopband. Single-parameter and statistical multiparameter sensitivity analyses are presented. >

12 citations

Journal ArticleDOI
01 Dec 1991
TL;DR: In this article, the synthesis of switched capacitor circuits of a wide variety of types is presented, which have a generic similarity, including the possibility of realising bilinear transformed transfer functions, minimisation of the number of amplifiers required and ability to apply scaling for optimum dynamic range and capacitor area minimisation.
Abstract: The synthesis of switched capacitor circuits of a wide variety of types is presented. First and second order sections for cascade and multifeedback filter realisations, integrators for functional simulation of classical LCR filters and simulated impedances for topological element simulation of LCR filters are considered. A principle of voltage inversion is shown to be a common aspect for all these types of circuit realisation. After considering techniques for the realisation of such voltage inversion, the principle is applied to a number of required subcircuits and hence to a number of diverse filter examples. In general, the circuits developed, which have a generic similarity, have a number of attractive features including the possibility of realising bilinear transformed transfer functions, minimisation of the number of amplifiers required and ability to apply scaling for optimum dynamic range and capacitor area minimisation. One of the results of this approach based on voltage inversion is a single amplifier, bilinear bandpass biquad.

4 citations

Journal ArticleDOI
TL;DR: In this paper, a systematic approach to the design of stray-insensitive switched-capacitor (SC) circuits from active-RC or RLC prototypes employing a parasitic insensitive SC differential voltage-controlled current-source as a basic building block is attempted.
Abstract: A systematic approach to the design of stray-insensitive switched-capacitor (SC) circuits from active-RC or RLC prototypes employing a parasitic insensitive SC differential voltage-controlled current-source as a basic building block is attempted. Procedures for transforming active-RC and RLC circuits into stray-insensitive SC circuits are formulated and illustrated with typical examples. Restrictions on the pole-frequency and pole-Q of the SC biquad are derived so that it closely emulates the frequency response of the original active-RC biquad. the SC biquad and the ladder filter derived by the proposed procedures were simulated with discrete components and tested in the laboratory. Test results agree closely with the theoretical predictions.

4 citations