Claims
- 1. A circuit for generating a first and a second output, said circuit comprising:
- a power source operating at a first frequency;
- an inductor connected serially to said power source;
- a capacitor connected serially to said inductor and said power source;
- said inductor and said capacitor having a resonate frequency that is greater than said first frequency;
- a first element connected to said inductor and said capacitor;
- a first switch connected to said first element and said power source;
- a first controller means connected to said first switch for pulse width modulating said first switch at a first PWM frequency that is greater than said resonate frequency thereby generating said first output at said first element;
- a second element connected to said inductor and said capacitor;
- a second switch connected to said second element and said power source; and
- a second controller means connected to said second switch for pulse width modulating said second switch at a second PWM frequency that is greater than said resonate frequency thereby generating said second output at said second element.
- 2. The circuit of claim 1 wherein said power source further comprising a bridge rectifier.
- 3. The circuit of claim 1 wherein:
- said first element being a heating element; and
- said second element being a transformer having a primary side and a secondary side, said primary side being connected to said second switch and said power source.
- 4. The circuit of claim 3 further comprising:
- a diode connected to a secondary side of said transformer; and
- a second capacitor connected to said diode and said secondary side of said transformer.
- 5. The circuit of claim 4 further comprising at least one power converter connected to said second capacitor.
- 6. A circuit for heating a heating element to a desired temperature and generating an output from a power source, said power source having a periodic varying voltage, said circuit comprising:
- said power source operating at a first frequency;
- a rectifier connected to said power source;
- an inductor connected serially to said rectifier and said heating element;
- a capacitor connected serially to said inductor and said rectifier;
- said inductor and said capacitor having a resonate frequency that is greater than said first frequency;
- a first switch connected to said heating element and said rectifier;
- a first controller means connected to said first switch for pulse width modulating said first switch at a first PWM frequency that is greater than said resonate frequency thereby heating said heating element to said desired temperature;
- an element connected to said inductor and to said capacitor;
- a second switch connected to said element and said rectifier; and
- a second controller means connected to said second switch for pulse width modulating said second switch at a second PWM frequency that is greater than said resonate frequency thereby generating said output at said element.
- 7. The circuit of claim 6 further comprising:
- a means for sensing a temperature of said heating element, said first controller means turning said first switch off and on in accordance with said means for sensing.
- 8. The circuit of claim 6 further comprising:
- a means for sensing a voltage of said output, said second controller means turning said second switch off and on in accordance with said means for sensing.
- 9. The circuit of claim 8 further comprising:
- said element being a transformer having a primary side and a secondary side, said primary side being connected to said second switch and said inductor;
- a diode connected to said secondary side of said transformer; and
- a second capacitor connected to said diode and said secondary side of said transformer.
- 10. The circuit of claim 9 further comprising at least one power converter connected to said second capacitor.
- 11. A circuit for heating a heating element to a desired temperature and generating an output from a power source, said power source having a periodic varying voltage, said circuit comprising:
- said power source operating at a first frequency;
- a means for sensing a temperature of said heating element;
- a means for sensing a voltage of said output;
- a rectifier connected to said power source;
- an inductor connected to said rectifier and said heating element;
- a capacitor connected to said inductor and said rectifier;
- said inductor and said capacitor having a resonate frequency that is greater than said first frequency;
- a first switch connected to said heating element and said rectifier;
- a first controller means connected to said first switch and said means for sensing said temperature, said first control means generating an temperature error indicator that is indicative of an error between said desired temperature and said temperature, said first controller means using said temperature error indicator to pulse width modulating said first switch at a first PWM frequency that is greater than said resonate frequency thereby heating said heating element to said desired temperature;
- an element connected to said inductor;
- a second switch connected to said element and said rectifier; and
- a second controller means connected to said second switch and said means for sensing said voltage, said second control means generating an voltage error indicator that is indicative of an error between a desired voltage and said voltage, said second controller means using said voltage error indicator to pulse width modulating said second switch at a second PWM frequency that is greater than said resonate frequency thereby generating said output at said element.
- 12. The circuit of claim 11 further comprising:
- said element being a transformer having a primary side and a secondary side, said primary side being connected to said second switch and said inductor;
- a diode connected to said secondary side of said transformer; and
- a second capacitor connected to said diode and said secondary side of said transformer.
- 13. The circuit of claim 12 further comprising at least one power converter connected to said second capacitor.
CROSS-REFERENCE TO RELATED APPLICATION
The present application is related to the following co-pending U.S. Patent applications being assigned to the same assignee and filled on the same date, entitled:
US Referenced Citations (9)