To meet the demand of the standard P well CMOS process a new type of current summing Bandgap voltage reference has been proposed . The circuit can output a stable voltage relative to the ground and can offer multi voltage references .

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In summing of the last product in the traditional multiplier design the array or iteration summing method is used which is not suitable to the design of small or middle scale integration circuit .

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The designed VGA is composed of input matching circuit control voltage conversion circuit Signal Summing structure cell and output matching circuit .

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