A gain-enhanced fully differential amplifier architecture for pipelined adc
A fully differential amplifier, enhanced technology, used in differential amplifiers, DC-coupled DC amplifiers, amplifiers, etc., can solve problems such as increased cost and increased laser correction, and achieve the effect of stable gate voltage and high gain
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[0018] The present invention will be further described in detail below in combination with specific embodiments.
[0019] Such as figure 1As shown, the present invention is a gain-enhanced full differential amplifier structure for pipeline ADC, including MDAC main amplifier and two auxiliary amplifiers, the MDAC main amplifier is a two-stage amplifier, including 9 PMOS transistors and 10 NMOS transistors , a telescopic cascode amplifier is used as the first stage, and a common source amplifier is used as the second stage output stage. The output impedance Rp of the cascode structure composed of 2 PMOS transistors and 2 NMOS transistors The output impedance Rn of the formed cascode structure is the output impedance of the first stage; the two auxiliary amplifiers are composed of op amp AMP1 and op amp AMP2, through the op amp AMP1 and op amp AMP2, the first stage output impedance Rp and Rn are respectively Increase to AP*Rp and AN*Rn, wherein, AP and AN are the gain of operati...
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