Method and apparatus for high voltage generation

Details Method and apparatus for high voltage generation Method and apparatus for high voltage generation

1998-01-20

2000-04-25

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Terminal voltage or counter-electromotive force of...

3889281, 318500, H02P 900

Patent

active

060548258

ABSTRACT:
A voltage generation circuit (60, 62) is adapted to sense voltages on multiple windings (82, 84, 86) of a multi-phase brushless DC motor (22) during successive intervals of a rotation of the motor (22) in which the respective windings (82, 84, 86) are not being driven. The voltage generation circuit (60, 62) provides a different output voltage from the voltage used to drive the motor (22). In one embodiment, the voltage generation circuit (60, 62) includes a voltage boosting circuit (62) to increase the output voltage above the drive voltage. This voltage generation circuit (60, 62) may be advantageously combined with an electrically programmable read only memory (EPROM) (56) on a single integrated circuit chip. The voltage generation circuit (60, 62) generates the EPROM programming voltage without the need for a costly on-chip charge pump or off-chip DC-DC converter.

REFERENCES:
patent: 5377094 (1994-12-01), Williams et al.
patent: 5600217 (1997-02-01), Bartlett
patent: 5633568 (1997-05-01), Dunfield
Motorola Inc., 1992, Technical Data, "MC68HC705H2 HCMOS Microcontroller Unit", pp. 1-1 -1-10.
SGS-Thomson Microelectronics, Jun. 1993, "Sensorless Spindle Motor Controller L6238", pp. 1/35 -3/35 and 25/35 -26-35.
Philips Semiconductors, Integrated Circuits Data Sheet, May 1996, "TDA5148B VCM and Spindle Driver Combo", pp. 1-25.

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