Low ripple voltage reference circuit

Details Low ripple voltage reference circuit Low ripple voltage reference circuit

1997-05-05

1999-07-06

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 330

Patent

active

059201843

ABSTRACT:
A first current (Iptat) having a magnitude proportional to absolute temperature is passed through a resistor (R3) and a PN-junction (QA) to produce first and second voltages (Vr+Vbe) having, respectively, positive and negative temperature coefficients which when summed provide a temperature stabilized internal reference voltage (Vbgrl). This internal reference voltage (Vbgrl) powers the current generator for currents (I1, 12)) which pass through a second resistor (R8, R9) and a second PN junction (Q20A, Q20B) to produce third and fourth voltages having respectively, positive and negative temperature coefficients which when summed provide a temperature stabilized external reference voltage (Vbgrl) having improved ripple rejection. There is no feedback from the external reference voltage (Vbgr2, V-out) to the first current (Iptat) generator (42).

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U. Tietze & Ch. Schenk, "Halbleiter-Schaltungstechnik", Springer-Verlag, 1993, pp. 558-559.
P. Horowitz & W. Hill, "The Art of Electronics", Cambridge Univ. Press, 1989, pp. 335-338.

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