US Patent No: 5,070,439

Number of patents in Portfolio can not be more than 2000

DC to DC converter apparatus employing push-pull oscillators

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Importance

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Abstract

A DC to DC converter employs a push-pull oscillator which employs a transformer having a primary winding and a plurality of secondary windings. The transformer has a core which is of a square loop hysteresis type. The push-pull oscillator is supplied operating voltage by means of a voltage regulator circuit which operates to regulate the voltage applied to the push-pull oscillator according to both input voltage variations and output load variations. An output secondary winding of the transformer is coupled to a full wave rectifier. The full wave rectifier output is fed back to the regulator to control the voltage applied to the push-pull oscillator via the regulator. Due to circuit operation, the output voltage is extremely well regulated while having low ripple.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROLM SYSTEMSSANTA CLARA, CA40
ROLM CORPORATIONSANTA CLARA, CA6

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Remson, Joseph D Scottsdale, AZ 9 62

Cited Art

Patent Info (Count) # Cites Year
 
KABUSHIKI KAISHA TOSHIBA (2)
4,783,795 X-ray generator system 19 1987
4,905,136 Power supplying apparatus 13 1988
 
FUKAMI PATENT OFFICE (1)
4,755,923 Regulated high-voltage power supply 4 1987
 
SOCIETE ANONYME DITE : ALCATEL ESPACE (1)
5,029,062 Electrical regulation and energy transfer circuit 59 1990

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
FAIRCHILD SEMICONDUCTOR CORPORATION (5)
6,075,295 Single inductor multiple output boost regulator 25 1997
5,903,138 Two-stage switching regulator having low power modes responsive to load power consumption 56 1997
6,166,455 Load current sharing and cascaded power supply modules 24 1999
6,091,233 Interleaved zero current switching in a power factor correction boost converter 65 1999
6,344,980 Universal pulse width modulating power converter 31 1999
 
VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY (2)
7,560,912 Hybrid filter for high slew rate output current application 1 2006
7,583,065 Hybrid filter for high slew rate output current application 3 2009
 
DELL USA, L.P. (1)
5,430,641 Synchronously switching inverter and regulator 75 1994
 
HONDA MOTOR CO., LTD. (1)
7,557,547 Self exited oscillation converter providing a stable output voltage from a wide range of input voltages 0 2005
 
KABUSHIKI KAISHA SAMY (1)
5,621,620 Converter 3 1995
 
MICRO LINEAR CORPORATION (1)
6,469,914 Universal pulse width modulating power converter 41 2001
 
SIEMENS ENTERPRISE COMMUNICATIONS, INC. (1)
5,239,453 DC to DC converter employing a free-running single stage blocking oscillator 9 1992
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,317,496 DC/DC-converter with a primary circuit and at least one secondary circuit tuned as individually oscillatory circuits 8 1992