Circuit for generating reference voltage

Details Circuit for generating reference voltage Circuit for generating reference voltage

2009-12-16

2011-10-04

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S549000

Reexamination Certificate

active

08030979

ABSTRACT:
A reference voltage generating circuit includes a reference voltage generating unit generating a uniform reference voltage in response to a bias voltage, a bias voltage generating unit generating the bias voltage, and a start-up circuit, after activating the bias voltage generating unit by receiving a first supply voltage, canceling a change of the first supply voltage to maintain a separation from the bias voltage generating unit. The circuit adopts a start-up circuit having a voltage distributing unit, thereby preventing a quiescent point of a bias voltage generating unit from entering a zero state and prevents a reference voltage from rising in a power-up state that an analog supply voltage rises according to a change of an external design environment such as a power, a temperature, a process parameter and the like, thereby generating a reference voltage more stably. As a result, current consumption and power consumption are minimized.

REFERENCES:
patent: 6784652 (2004-08-01), Aude
patent: 7531999 (2009-05-01), Chang
patent: 7589573 (2009-09-01), Tang et al.

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