Diode stack high voltage regulator

Details Diode stack high voltage regulator Diode stack high voltage regulator

2007-04-10

2007-04-10

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S316000, C323S280000

Reexamination Certificate

active

11236359

ABSTRACT:
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 Vout, a diode stack that includes a plurality of serially connected transistors T0, T1, T2, . . . Tn, wherein the transistor T1is connected to a node n0, to which is connected another transistor T0that receives an input bias voltage Vbias, and wherein a feedback voltage fb from node n0is fed to an input of the differential amplifier, the differential amplifier receiving an input reference voltage Vrefat 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 GDA*GNMOS*m, resulting in a generally constant feedback (loop) gain Gloop, wherein the loop gain is given by:in-line-formulae description="In-line Formulae" end="lead"?Loop Gain=Gloop=Gstack*GDA*GNMOS*min-line-formulae description="In-line Formulae" end="tail"?wherein m is the ratio of the two currents I1and I2, that is, I2=mI1, Gstackis the gain of the diode stack, GDAis the gain of the differential amplifier and GNMOSis the gain of the NMOS transistor M.

REFERENCES:
patent: 5483150 (1996-01-01), Elliott et al.
patent: 5783934 (1998-07-01), Tran
patent: 6861831 (2005-03-01), Ngiap Ho

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