| 摘要 |
A high voltage regulator including a current mirror including a pair of transistors, one of the transistors being connected to a node that outputs an output voltage V<SUB>out</SUB>, a diode stack that includes a plurality of serially connected transistors T<SUB>0</SUB>, T<SUB>1</SUB>, T<SUB>2</SUB>, . . . T<SUB>n</SUB>, wherein the transistor T<SUB>1 </SUB>is connected to a node n<SUB>0</SUB>, to which is connected another transistor T<SUB>0 </SUB>that receives an input bias voltage V<SUB>bias</SUB>, and wherein a feedback voltage fb from node n<SUB>0 </SUB>is fed to an input of the differential amplifier, the differential amplifier receiving an input reference voltage V<SUB>ref </SUB>at one of its other inputs, and is also connected to positive voltage supply Vdd, the differential amplifier outputting to an NMOS transistor M, and wherein the high voltage regulator has a large diode stack gain and lower G<SUB>DA</SUB>*G<SUB>NMOS</SUB>*m, resulting in a generally constant feedback (loop) gain G<SUB>loop </SUB>wherein the loop gain is given by: <?in-line-formulae description="In-line Formulae" end="lead"?>Loop Gain=G<SUB>loop</SUB>=G<SUB>stack</SUB>*G<SUB>DA</SUB>*G<SUB>NMOS</SUB>*m <?in-line-formulae description="In-line Formulae" end="tail"?> wherein m is the ratio of the two currents I<SUB>1 </SUB>and I<SUB>2</SUB>, that is, I<SUB>2</SUB>=mI<SUB>1</SUB>, G<SUB>stack </SUB>is the gain of the diode stack, G<SUB>DA </SUB>is the gain of the differential amplifier and G<SUB>NMOS </SUB>is the gain of the NMOS transistor M.
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