Supply tracking temperature independent reference voltage genera

Details Supply tracking temperature independent reference voltage genera Supply tracking temperature independent reference voltage genera

1996-11-12

1998-03-10

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323313, G05F 316, G05F 326

Patent

active

057265631

ABSTRACT:
A reference voltage generator (100) generates a constant offset reference voltage (125) relative to a reference ground voltage (115) that tracks supply voltage (105). The supply voltage (105) is scaled to derive the reference ground voltage (115). A scaled voltage output (135) is derived from a temperature and supply independent voltage source, such as a bandgap voltage generator. The scaled voltage output (135) is summed with the reference ground voltage (115) to generate the constant offset reference voltage (125). The summing function is preferably performed by an operational amplifier (220) having an input (221) coupled to the scaled voltage output by a MOSFET transistor (242), and another input (222) coupled to the reference ground voltage (115).

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