Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-03-27
1997-12-02
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327543, 327546, 323316, G05F 110
Patent
active
056940769
ABSTRACT:
An NMOS transistor (2) has a source electrode, a drain electrode and a gate electrode which are connected to a power source (VSS), an output terminal of a stepdown circuit (27), and a node (N2) between load elements (11, 12) respectively. The transistor size of the NMOS transistor (2) is so set that its drain current exerts no influence on fluctuation of an output voltage (VDD2) when an output voltage control operation by a differential amplification circuit (29) and the stepdown circuit (27) is functional to enable suppression of fluctuation of the output voltage (VDD2), while the output voltage (VDD2) is stepped down on the basis of the current quantity of the drain current of the NMOS transistor (2) when the output voltage control operation is unfunctional to disable suppression of fluctuation of the output voltage (VDD2). Thus, obtained is a voltage generation circuit which can reliably suppress fluctuation of the output voltage regardless of the frequency of fluctuation in source voltage.
REFERENCES:
patent: 4585955 (1986-04-01), Uchida
patent: 5249155 (1993-09-01), Arimoto et al.
patent: 5300823 (1994-04-01), Ihara
patent: 5426616 (1995-06-01), Kajigaya et al.
Cunningham Terry
Mitsubishi Denki & Kabushiki Kaisha
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