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Ota based logarithmic circuit for arbitrary input signal and its application

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Ota based logarithmic circuit for arbitrary input signal and its application Ota based logarithmic circuit for arbitrary input signal and its application Ota based logarithmic circuit for arbitrary input signal and its application Ota based logarithmic circuit for arbitrary input signal and its application

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Ota based logarithmic circuit for arbitrary input signal and its application

  1. 1. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back OTA-Based Logarithmic Circuit for Arbitrary Input Signal and Its Application Abstract: In this paper, a new design procedure has been proposed for realization of logarithmic function via three phases: 1) differentiation; 2) division; and 3) integration for any arbitrary analog signal. All the basic building blocks, i.e., differentiator, divider, and integrator, are realized by operational transconductance amplifier, a current mode device. Realization of exponential, power law and hyperbolic function as the design examples claims that the proposed synthesis procedure has the potential to design a log-based nonlinear system in a systematic and hierarchical manner. The proposed architecture of this paper area and power consumption analysis using tanner tool. Enhancement of the project: To change the parameter of the architecture for reduces the noise and power. Existing System: Logarithmic and exponential functions, having a wide application in communication and signal processing, are generally implemented using bipolar junction transistors (BJTs) or MOS transistor in weak inversion using their exponential characteristics. In this paper, a thorough understanding of a mathematical model combined with hardware compatibility has been exploited to realize logarithmic and exponential functions for various analog signals, which leads to an improved design. A low-cost, high-speed architecture for binary logarithm approximation has been proposed by many researchers. Mitchell’s method with a correction stage composed of piecewise linear interpolation and a lookup-table correction is used to compute binary logarithm. Both the architectures are implemented in an FPGA. Voltage–current relationships of a p-n
  2. 2. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back junction diode and Taylor’s series expansion have been used to realize logarithmic and exponential function. Significant efforts have been invested in using MOS transistors in saturation region for the implementation of exponential functions. Liu and Liu proposed a compact, low-power, and CMOS exponential function generator with a wide dynamic range. A CMOS pseudo exponential function circuit based on Taylor series approximation using MOS transistor operating at saturation region is presented. Chang and Liu proposed a voltage-mode and a current-mode pseudo exponential function circuit. A low-voltage CMOS current mode exponential circuit has been described using MOS transistors in weak inversion. Translinear principle is used to implement the approximation to cancel the temperature effect. Maundy et al. [9] introduced a pseudo exponential and pseudo logarithmic circuit using operational amplifier (op-amp). Disadvantages:  High noise in the circuit  High power Proposed System: OTA-Based Building Blocks Differentiator: Fig. 1(a) shows the OTA-based differentiator. Uniformity has been maintained in numbering the active and passive components of the building blocks in all the figures in this paper. For example, in Fig. 1(a), the differentiator circuit is demonstrated with the active and passive components marked as O(1), O(2), O(3), and C1 and this configuration has been followed for all the blocks.
  3. 3. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back Fig. 1. OTA-based differentiator. Divider Different techniques have been developed to implement multiplier using MOS transistor, op- amp, BJT, subthreshold MOS OTAs, and so on. Fig. 2 OTA-based divider
  4. 4. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back Integrator Fig. 3 OTA-based integrator
  5. 5. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back Fig. 4. Realization of ln [f (t)] based on (1).
  6. 6. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back TRANSISTOR LEVEL SCHEMATIC OF OTA Advantages:  Better tenability  Better programmability Software implementation:  Tanner tools
  7. 7. ONLINE IEEE PROJECTS IeeeXpert.com BUY THIS PROJECT FOR 2000 RS –IeeeXpert.com Mobile: +91-9566492473/+91-9042092473 | WhatsApp: 09566492473 Email: contact@ieeexpert.com | Locations: Pondicherry/Chennai Delivering Projects all over India | 100% Output Satisfaction (or) Get Money back

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