A Low noise variable gain amplifier (VGA) was designed using TSMC 0.13 um CMOS technology. This design is proposed to work at frequency range of 40 to 950 MHz. In this proposed work a numbers of attenuators are placed after two stages of Low noise amplifiers [LNA]. Each attenuator is used to obtain variable gain of amplifier. Control Voltage is applied to each attenuator to obtain variation in gain. The first stage of amplifier is designed for high gain and low noise figure. The second stage is designed for high gain and high linearity. The proposed VGA have achieved the gain of -0.81 db to 29.08 db at 40 MHz and -3.14 db to 26.644 db at 950 MHz. The noise figure of proposed designed is 1.747 db at 40 MHz and 1.411db at 950 MHz when all attenuators are off and 4.032 db at 40 MHz and 4.995 db at 950 MHz when all attenuators are on.