Signal Processing

Download DSP Integrated Circuits by Lars Wanhammar PDF

By Lars Wanhammar

DSP built-in Circuits establishes the fundamental interface among conception of electronic sign processing algorithms and their implementation in full-custom CMOS expertise. With an emphasis on suggestions for co-design of DSP algorithms and with the intention to in attaining excessive functionality when it comes to throughput, low strength intake, and layout attempt, this ebook offers the pro engineer, researcher, and pupil with a company beginning within the theoretical in addition to the sensible facets of designing excessive functionality DSP built-in circuits. founded round 3 layout case experiences, DSP built-in Circuits completely information a high-performance FFT processor, a 2-D Discrete Cosine remodel for HDTV, and a wave electronic filter out for interpolation of the sampling frequency. The case reviews hide the basic elements of the layout technique in a top-down demeanour, from specification of set of rules layout and optimization, scheduling of operations, synthesis of optimum architectures, cognizance of processing parts, to the floor-planning of the built-in circuit. * information the speculation and layout of electronic filters - fairly wave electronic filters, multi-rate electronic filters, quick Fourier transforms (FFT's), and discrete cosine transforms (DCT's) * Follows 3 entire ''real-world'' case stories through the booklet * offers whole insurance of finite notice size results in DSP algorithms * In-depth survey of the computational homes of DSP algorithms and their mapping to optimum architectures * Outlines DSP architectures and parallel, bit-serial, and dispensed mathematics * provides the layout approach in a top-down demeanour and accommodates a number of difficulties and recommendations

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3 MOS Logic 39 to get a sufficiently low output voltage. It is therefore preferable to use NOR gates instead of NAND gates, since the n-devices, in the former case, are connected in parallel. The main drawbacks with nMOS logic circuits are the static power dissipation and the fact that a logic 0 at the output is obtained as a ratio between two impedances. The ratio is critical to the function of the gate and requires careful design. The load can be implemented using either a resistor or an nMOS transistor.

68 ns. In view of the simple model this is a reasonably good estimate. There is an asymmetry in the rise and fall times since the electron mobility is about three times larger than the hole mobility. As mentioned before, the asymmetry is reduced in practice by increasing the width of the p-channel transistor. 1. Particularly, study the effect on propagation time and power consumption. , rise time rr and fall time if. The load is 100 fF. Obviously, the rise and fall times increase with increasing slope of the input signal.

Design Entity A module is viewed as a design entity, which can be as simple as a NAND gate or as complicated as a digital filter. The description of a design entity in all three styles is divided into the interface description and one or more architectural bodies. The use of design libraries is encouraged. The interface description (port map) specifies the entity's connections with the external environment, whereas the architectural body describes its function which can be described in the three styles just mentioned.

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