Electricity: motive power systems – Motor-reversing – Automatic and/or with time-delay means
Patent
1995-06-15
1996-11-26
Ip, Paul
Electricity: motive power systems
Motor-reversing
Automatic and/or with time-delay means
318266, 318466, 318649, 343715, 343903, G05B 1929
Patent
active
055789102
ABSTRACT:
This invention relates to a skew motor driving circuit of satellite video receiver for eliminating a remaining voltage of ripple form generated at skew motor in a satellite video receiver such as SVR and the like. The invention is an apparatus for receiving a satellite video, a third transistor Q3 for executing on/off operation in response to control signal controlling a skew motor, a first transistor Q1 for supplying/cutting a skew motor input power 1 in conjunction with the operation of the third transistor, a fourth transistor Q4 for eliminating a remaining voltage remaining upon cutting a driving voltage supplied to said skew motor by an operation being contrary to the operation of said first and third transistors, and a second transistor Q2 for supplying skew pulses to the skew motor in response to the skew pulse signal.
REFERENCES:
patent: 4072886 (1978-02-01), Dammeyer
patent: 4275394 (1981-06-01), Mabuchi et al.
patent: 4446407 (1984-05-01), Sperber
patent: 4542326 (1985-09-01), Hornback
patent: 4730152 (1988-03-01), Foust et al.
patent: 4761593 (1988-08-01), Nakase
patent: 4873526 (1989-10-01), Katsuo
patent: 4990836 (1991-02-01), Nakase et al.
patent: 5061936 (1991-10-01), Suzuki
Ip Paul
Samsung Electro-Mechanics Co. Ltd.
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