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Design Of Cmos Analog Signal Multiplier Using Differential

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Design Of Cmos Analog Signal Multiplier Using Differential Powered By Docstoc
					A NEW LOW POWER HIGHER BANDWIDTH CURRENT MODE
       DESIGN OF ANALOG SIGNAL MULTIPLIER

                        Mr. U. B. S. CHANDRAWAT
                     Lecturer, EI Engg. Deptt,, S.G.S.I.T.S
                           Indore, M.P. 452003, India

                               Dr. D. K. MISHRA
                   Proff. & HOD of EI Engg. Deptt, S.G.S.I.T.S.,
                            Indore, M.P. 452003, India.

                           Mr. ADITYA VELLORE
                     Lecturer, EI Engg. Deptt,, S.G.S.I.T.S
                           Indore, M.P. 452003, India


                               Mr. AFTAB BEIG
           MTECH (MICROELEX. & VLSI DESIGN), EI ENGG. DEPTT,
                    S.G.S.I.T.S., INDORE, M.P. 452003, INDIA.




 ABSTRACT:
 This paper presents a research work on a analog signal multiplier using
 current conveyor. Normally, we make a multiplier by using op-amp. The
 major problem with these analogue multipliers is the limited bandwidth for
 many signal processing applications. The proposed building block introduces
 a technique, based on current-conveyor, suitable for the design of a high
 frequency bandwidth analogue multiplier. Since a current mode circuit has
 greater advantages over a voltage mode circuit like large gain, more
 linearity, higher slew rate etc, we can replace the OP-AMP by a current
 mode circuit i.e. by a current conveyor. The most advantage of this circuit is
 the large bandwidth. Here we using a differential difference current
 conveyor which has better linearity, gain & bandwidth with a differential
 input facility as compare to other current conveyor circuit like CCI, CCII,
 etc. We design a Full-Differential CMOS Analog Multiplier using Current
 Conveyors with rail to rail voltage of ±2.5 volt & 85 MHz bandwidth in 0.5
 um technology using tanner tool. The power consumption is about 4.2mW
 from a ±2.5V power supply voltage, and the total harmonic distortion is
 1.23% with a 1V input signal.

				
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Lingjuan Ma Lingjuan Ma
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