In addition, our 10T Approximate Adder has 17.03 % less propagation delay compared to the existing circuit of AA4. Our simulation results proved that the proposed 10T Approximate Adder has 9.97 % less average power compared to the existing circuit of Approximate Adder AA1. The circuit designs simulation is implemented in the HSPICE tool and the results are compared with existing circuits.
Based on the CNFET technology, three proposed circuit designs 16T Half Subtractor, 10T Approximate Adder, and 13T Approximate Adder are proposed. This project presents high speed and low power Approximate Adders / Subtractor circuit designs for energy efficiency, low power consumption, and reduction of size. The CNFET technology consists of P-type and N-type transistors of equal sizes and provides the same drive currents, which are essential for reducing the transistor sizes in complex circuit designs. It overcomes the challenges such as high leakage current, hot effect on electrons, Drain-Induced Barrier Lowering (DIBL), impacts on short channel effects, etc. The Carbon Nanotube Field Effect Transistor is one of the significant areas of research going and adaptable for scaling. Arithmetic circuits are based on Carbon Nanotube Field Effect Transistor (CNFET) technology and are broadly used in image processing and digital signal processing applications. Adders or Subtractors are the fundamental essential blocks of arithmetic circuits and are considered important for approximate computing to bring out improvements in the efficiency of circuit design. The demand for electronic equipments with low power consumption, high performance, compact design, and energy efficiency has been increasing and has become a significant design concern.
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The measurements were taken using a manual wafer prober with climate-controlled microchamber, at temperatures ranging from −40 ☌ to +125 ☌. The data presented in the paper were obtained from process corner and Monte Carlo simulations as well as from measurements. The presented analog frontend consumes no more than 185 μA and was designed and manufactured with United Microelectronics Corporation (UMC) CMOS 130 nm technology. This calibration method was elaborated for integrated circuits operating in temperatures from −40 ☌ to +125 ☌. The developed calibration technique enables very high accuracy, even 0.1 ☌, to be obtained in a very wide temperature range. The discussed analog frontend consists of a bandgap current reference, a precision current source, a programmable gain amplifier, a voltage source proportional to absolute temperature and an on-chip calibration resistor. A new and novel temperature calibration technique using an on-chip resistor was developed specifically for the analog frontend.
So even huge designs are painted with a acceptable performance.In this paper an analog frontend for a reliable measurement of the human body temperature is presented. With bigger designs a lack of performance is automatically detected and scarcely visible details are omitted. Medium sized designs (up to several hundred MB of GDS file size, exact size may depend on the design) can be painted with all details in real time. Also the painting performance is excellent and can easily compete with any other tool. So for example multi Gb GDSII files can be loaded in seconds. All significant features of the LayoutEditor are optimized to handle huge designs. Īs designs can extend to several Gb in file size, perfomance is an important factor.
GDSII, OASIS, OpenAccess, CIF, DXF, Gerber, LEF, DEF, SVG, Lasi, SOURCE, CSV, PNG, JPG, Alliance, Electromask, PS, EPS, ODB++, EDIF, Qucs, Spice. It also works natively with many other common and also some uncommon formats: The Calma GDSII file format is used as the primary file format. The LayoutEditor does not need a own file format.
The most important handling functions like zooming and scrolling are integrated into each feature and need not be called up separately. This virtual challenge is solved by the extensive use of shortcuts and mouse button/key combinations together with clear display of these combinations. A cleverly worked out user interface provides outstanding usability on the one hand and high productivity on the other.
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