This paper presents an evolutionary design of digital IIR filters using the genetic algorithm (GA) with modified genetic operators and real-valued encoding. Conventional digital IIR filter design methods involve algebraic transformations of the transfer function of an analog low-pass filter (LPF) that satisfies prescribed filter specifications. Other types of frequency-selective digital filters...

One of the most important tasks in design and manufacturing of integrated circuits is the testing phase. Distinguishing between faulty and fault free ICs is a difficult task Therefore, simulations are being done for different circuits to identify fault free and faulty circuits. The circuits include analog circuits, digital circuits &mixed signal circuits. Analog circuits like Low pass filter, H...

A universal biquadratic filter using single universal voltage conveyor (UVC), two resistors and two capacitors is presented in this paper. The proposed structure has three inputs and one output and can realize all the five standard biquadratic filters: low-pass (LP), high-pass (HP), band-pass (BP), band-reject (BR) and all-pass (AP) from the same circuit configuration. The presented universal f...

This paper discusses the invariance of the second-order modes of 2-D separable denominator digital filters under frequency transformation. This paper first derives a state-space description for 2-D digital filters obtained by 2-D frequency transformation and then represents the controllability Gramians and the observability Gramians of the transformed 2-D digital filters. This description prove...

This paper presents an optimum tuning procedure for high-order low-pass (LP) elliptic filters. Since elliptic filters are often used to satisfy very tight specifications, they often need to be tuned accurately. In this paper, we describe the tuning of one biquad, the 'tuning biquad', in a cascade of biquads. It is shown by Matlab simulations that the best choice for the tuning biquad consists o...

A fully re-configurable channel select filter is presented which is used as a part of a multi mode direct conversion receiver. The filter supports different modes including GSM, IS-95, and UMTS. A 4 order Butterworth filter is realized in a gmC filter topology. The filter circuit is implemented in a standard 0.35 μm CMOS process. The filter is able to handle large input signals up to 600mVpp at...

The digital all-pass filter is a computationally efficient signal processing building block which is quite useful in many signal pmcessing applications. In this tutorial paper we review the properties of digital all-pass filters, and provide a broad overview of the diversity of applications in digital filtering. Starting with the definition and basic properties of a scalar all-pass function, a ...

In this paper, a new Ultra-Wideband (UWB) Band-Pass Filter (BPF) for UWB applications is presented. The proposed filter is based on ring resonator with inter-digital coupling at both sides. The inter-digital coupling is used to providing strong coupling and to introduce capacitance effect to achieve at pass-band response. To achieve band rejection characteristics L-shaped open stubs are incorpo...