A high performances CMOS CCII and high frequency applications

Abstract

In this paper, we propose an improved translinear based CCII configuration. Heuristic algorithm is used for optimal sizing regarding static and dynamic performances. PSPICE simulations for AMS 0.35 µm CMOS technology show that the current and voltage bandwidths are respectively 2.6 GHz and 3.9 GHz, and the parasitic resistance at port X (R X ) has a value of 18 for a control current of 100 µA. The improved configuration is used as a building block into high frequency design applications: a current controlled oscillator and a tunable fully integrable band pass filter. The oscillator frequency can be tuned in the range of [290-475 MHz] by a simple variation of a DC current. The central frequency of the band pass filter can be varied in the range of [1.22-1.56 GHz] and the quality factor vary in the range [8-306] with a simple variation of a DC current.

A Particle Swarm Optimization Technique used for the Improvement of Analogue Circuit Performances

“…The aim consists of determining the optimal Pareto circuit's variables, i.e. widths and lengths of each MOS transistor, and the bias current I 0 , that maximizes the conveyor high current cut-off frequency and minimizes its parasitic Xport resistance (R X ) (Bensalem et al, 2006;Fakhfakh et al 2007). Fig.…”

Automatic Synthesis of VFs and VMs by Applying Genetic Algorithms

“…By setting k1 = 0.65 and k2 = 0.74 the best VF is the individual 560828. The behavior of the useful VFs can be optimized for high-frequency applications using the method introduced in [8,19], and in noise by applying the method given in [9]. Most important is the fact that the VFs can be evolved to design VMs.…”

“…From the characteristics shown in Table 4, the ordering from the best to the worst synthesized VF is: 560828, 3711904, 2794892, 2241512, 1369000, 1715676, and 110381. They can be used to design CCs [2,19], and input stages for CFOAs [12]. In fact, in [12] the VFs 560828 and 2794892, shown in Fig.…”

CMOS current mirror with enhanced input dynamic range

“…Especially, for active elements such as op-amps, current conveyors, current feedback amplifiers, etc., CMs are often used to produce multiple outputs as well as operate as active loads. They are the integral parts of such components [1]. Although most CM topologies are desired to have high output impedance and large output voltage/current signal swings [2][3][4][5][6][7][8][9][10][11][12][13], there are certain applications, where designers are also interested in having large input swings.…”