Bandgap constant voltage circuit

Details Bandgap constant voltage circuit Bandgap constant voltage circuit

1992-05-13

1994-02-22

Sterrett, Jeffrey

Electricity: power supply or regulation systems

Self-regulating

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

323313, 323907, G05F 316

Patent

active

052891119

ABSTRACT:
A constant voltage circuit is to stabilize a constant voltage output with respect to a source voltage and produce the constant voltage output at a lower level of the source voltage. The constant voltage circuit is arranged to generate an output of constant voltage (constant voltage Vreg) by using a band-gap circuit (2), and comprises an error detecting circuit (4) for detecting an error voltage between the constant voltage generated by the band-gap circuit and a setting value, an output circuit (6) for receiving a current indicative of the error voltage from the error detecting circuit, generating a current depending on the received current, and feeding the generated current back to the band-gap circuit, and an initiating circuit (8) for supplying an initiation current to the band-gap circuit at the time of raising a source voltage.

REFERENCES:
patent: 3617859 (1971-11-01), Dobkin
patent: 3646436 (1972-02-01), Chan et al.
patent: 4849684 (1989-07-01), Sonntag et al.
patent: 4939442 (1990-07-01), Carvajal et al.
patent: 5084665 (1992-01-01), Dixon et al.
patent: 5087830 (1992-02-01), Cave et al.

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