Bandgap reference current source

Details Bandgap reference current source Bandgap reference current source

2006-09-26

2006-09-26

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C327S539000

Reexamination Certificate

active

07112947

ABSTRACT:
Bandgap reference current source for generating a reference current (IREF) having: at least two bipolar transistors (T1, T2), the base terminals (B1, B2) of which are interconnected and connected to a fixed reference potential, the collector terminals (C1, C2) of which are connected to a collector current ratio setting circuit (15, 16), which sets a specific current ratio (m) between the two collector currents (IC1, IC2) flowing through the collector terminals (C1, C2), and the emitter terminals (E1, E2) of which are connected via a first resistor (RA) to a current node (13) which adds the emitter currents (IE1, IE2) flowing through the emitter terminals (E1, E2) to form a summation current (ISUM), which forms the reference current (IREF).

REFERENCES:
patent: 4792748 (1988-12-01), Thomas et al.
patent: 5013934 (1991-05-01), Hobrecht et al.
patent: 38 36 338 (1989-05-01), None
patent: 05324108 (1993-12-01), None

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