Step motor control circuit and method of generating step...

Details Step motor control circuit and method of generating step... Step motor control circuit and method of generating step...

2006-10-24

2009-06-02

Masih, Karen (Department: 2837)

Electricity: motive power systems

Open-loop stepping motor control systems

C318S685000, C318S503000

Reexamination Certificate

active

07541768

ABSTRACT:
A step motor control circuit that does not fix a reference voltage of a step motor control signal. The step motor control circuit may include a digital-to-analog (DAC) signal generator configured to generate first and second DAC signals in response to a step motor error signal, a gain adjust block configured to control gains of the first and second DAC signals in response to a control signal and output first and second step motor control signals, and a gain controller configured to output the control signal in response to a mode signal and a gain control signal, in which the first and second step motor control signals are pulse trains including a reference voltage, and the reference voltage may be a fixed voltage when the mode signal indicates a normal mode and the reference voltage may be a variable voltage when the mode signal indicates a power consumption reduction mode.

REFERENCES:
patent: 4050017 (1977-09-01), Paufve
patent: 2004/0027186 (2004-02-01), Teterud
patent: 2005/0046400 (2005-03-01), Rotem
patent: 11-259875 (1999-09-01), None
patent: 10-2001-0027613 (2001-04-01), None
patent: 10-2004-0017874 (2004-03-01), None
patent: 10-2005-0060603 (2005-06-01), None

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