Programmable amplitude ramp generator for automotive voltage reg

Details Programmable amplitude ramp generator for automotive voltage reg Programmable amplitude ramp generator for automotive voltage reg

1996-05-30

1998-06-23

Stephan, Steven L.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

363123, 320 61, H02D 930

Patent

active

057709394

ABSTRACT:
A programmable amplitude ramp generator for an automotive voltage regulator includes a selection circuit (405) with an output (406) that provides a selection signal (407) with a plurality of states. A voltage reference circuit (401, 403) includes an output (410) that provides a different reference voltage dependent on each of the plurality of states of the selection signal (407). A resistive device (411) has an input (414) coupled to the output (410) of the voltage reference (401, 403), and an output (416). A gateable multi-resistive device (413) has an output (415) coupled to the output 416 of the resistive device 411. A coupleable resistive device (409) has an input (419) coupled to the output (410) of the voltage reference circuit (401, 403) and an output (421) coupleable to the output (416) of the resistive device (411) responsive to receipt of one of the plurality of states of the selection signal (407). A regulator load driving circuit (113, 109, 107, 105, 124) is coupled to the output () of the voltage reference circuit (401, 403). The described structure provides a multi-range operating capability for the automotive voltage regulator.

REFERENCES:
patent: 4346337 (1982-08-01), Watrous
patent: 4388586 (1983-06-01), Lamoth
patent: 4388587 (1983-06-01), Lamoth et al.
patent: 4420717 (1983-12-01), Wallace et al.
patent: 4486702 (1984-12-01), Edwards
patent: 4700124 (1987-10-01), Anderson
patent: 5184290 (1993-02-01), Ozawa et al.
patent: 5233508 (1993-08-01), Yamamura et al.

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