VHF DC-DC power supply operating at frequencies greater than 50 MHz

• US 4,980,810 A
• Filed: 05/25/1989
• Issued: 12/25/1990
• Est. Priority Date: 05/25/1989
• Status: Expired due to Term

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Hughes Aircraft Company (Rtx Corporation)
• Inventors: Biner, George, Anderson, administrator, by Roger K., McClanahan, Robert F., Washburn, Robert D., Lusher, David M., Martin, Earl H., Council, William J., Gonzalez, Carlos H., Anderson, deceased, James A.
• Primary Examiner(s): BEHA JR, WILLIAM
• Application Number:
  US07/357,400
• Time in Patent Office: 579 Days
• Field of Search: 363/16, 363/20, 363/131, 363/147
• US Class Current: 363/16
• CPC Class Codes: G05F 1/565 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor G05F1/563 takes precedence
• CPC Class Codes: H02M 3/28 using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac

Abstract

A DC to DC power supply including an RF driver circuit for providing an RF output drive signal having a frequency greater than about 50 MHz, power amplifier circuitry responsive to the RF output drive signal and a DC voltage supply for providing an amplified AC output, and an impedance transforming circuit such as a balun transformer for transforming the AC amplified output to an impedance transformed AC signal. The transformed AC signal is provided to a rectifying circuit which provides a DC output. A feedback regulation control circuit provides for regulation of the power supply output voltage. The DC to DC power supply is advantageously implemented with printed microstrip or stripline passive components.

Claims

1. A DC to DC power supply comprising;

RF drive means for providing an RF output drive signal having a frequency greater than about 50 Mhz;

amplifier means responsive to said RF output drive signal and to a DC supply voltage for providing an AC amplified output;

means for impedance transforming said AC amplified output to provide an impedance transformed AC signal; and

means for rectifying said impedance transformed AC signal to provide a DC voltage output.

2. The DC to DC power supply of claim 1 wherein said amplifying means comprises a power amplifier tuned to the frequency of said RF drive means.

3. The DC to DC power supply of claim 2 wherein said power amplifier comprises a common base amplifier.

4. The DC to DC power supply of claim 2 wherein said common base amplifier includes a tuned input matching network and a tuned output matching network.

5. The DC to DC power supply of claim 2 wherein said power amplifier comprises a common emitter amplifier.

6. The DC to DC power supply of claim 5 wherein said common emitter amplifier includes a tuned input matching network and a tuned output matching network.

7. The DC to DC power supply of claim 1 wherein said impedance transforming means comprises a balun transformer.

8. The DC to DC power supply of claim 1 wherein said amplifying means comprises:

power splitting means responsive to said RF output drive signal for providing a plurality of RF drive signals; and

a plurality of power amplifiers respectively responsive to said RF drive signals for providing a plurality of amplified AC out signals.

9. The DC to DC power supply of claim 6 wherein said impedance transformation means comprises a plurality of impedance transformation circuits respectfully responsive to said plurality of amplified AC output signals.

10. The DC to DC power supply of claim 6 wherein said amplifying means further includes power combining means for combining said amplified AC output signals to provide a combined AC output signal.

11. The DC to DC power supply of claim 6 wherein said plurality of amplifiers comprise a plurality of stacked amplifiers which are DC biased in series.

12. The DC to DC power supply of claim 9 wherein each of said plurality of amplifiers comprises a common base amplifier.

13. The DC to DC power supply of claim 12 wherein said common base amplifier includes a tuned input matching network and a tuned output matching network.

14. The DC to DC power supply of claim 9 wherein each of said plurality of amplifiers comprises a common emitter amplifier.

15. The DC to DC power supply of claim 14 wherein said common emitter amplifier includes a tuned input matching network and a tuned output matching network.

16. The DC to DC power supply of claim 1 further including feedback regulation control means responsive to said DC voltage output and a reference voltage for controlling said RF drive means.

17. The DC to DC power supply of claim 16 wherein said RF drive means includes a bipolar transistor amplifier and wherein said feedback regulation control means controls the current provided by the emitter of said transistor amplifier.

18. The DC to DC power supply of claim 17 wherein said feedback regulation control means includes an FET coupled to the emitter said transistor amplifier and means for linearizing the current gain of said FET.

19. A DC to DC power supply comprising;

RF drive means for providing an RF output drive signal having a frequency greater than 50 Mhz;

amplifier means responsive to said RF output drive signal and to a DC supply voltage for providing an AC amplified output;

means for impedance transforming said AC amplified output to provide an impedance transformed AC signal;

means for rectifying said impedance transformed AC signal to provide a DC voltage output; and

feedback regulation control means responsive to said DC voltage output and a reference voltage for controlling said RF drive means.

20. The DC to DC power supply of claim 19 wherein said RF drive means includes a bipolar transistor amplifier and wherein said feedback regulation control means controls the current provided by the emitter of said transistor amplifier.

21. The DC to DC power supply of claim 20 wherein said feedback regulation control means includes an FET coupled to the emitter said transistor amplifier and means for linearizing the current gain of said FET.