High-efficiency high-power amplifier
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsDonald C. Cox, Mehdi F. Soltan, Thomas H. Lee
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Abstract
An inexpensive method and means for generating high power envelope-modulated radio frequency signals is disclosed. Embodiments provide EER amplification and separate modulation of information encoded as phase angle and as amplitude. An envelope modulated signal generation apparatus comprising a source of carrier signal, a source of a binary data stream, a pulse deletion logic and a current switch is disclosed.
Claims15
A method for generating a signal, the method comprising:
- a. providing a carrier signal comprising pulses;
- b. providing a binary data stream that represents information;
- c. generating a first control signal from the carrier signal by excluding pulses selected in response to the binary data stream;
- d. providing a high speed switching device having a control terminal;
- and
- e. impressing the first control signal upon the control terminal of the high speed switching device to produce a higher powered signal;
- whereby an envelope modulated signal is generated.
A method for generating a signal, the method comprising the steps of:
- a. step for providing a carrier signal comprising pulses;
- b. step for providing a binary data stream that represents information;
- c. step for generating a first control signal from the carrier signal by excluding pulses selected in response to the binary data stream;
- d. step for providing a high speed switching device having a control terminal;
- and
- e. step for impressing the first control signal upon the control terminal of the high speed switching device to produce a higher powered signal;
- whereby an envelope modulated signal is generated.
An apparatus for generating an envelope modulated signal comprising:
- a source of carrier signal;
- a source of a binary data stream;
- a pulse deletion logic for receiving the carrier signal and producing a control signal in response to the binary data stream;
- and
- a current switching device for generating an output signal in response to the control signal, the output signal having a greater amplitude than the carrier signal.
An amplifying apparatus comprising:
- a demodulator for recovering a baseband signal from an envelope modulated signal;
- a digitizer for converting the baseband signal into a binary data stream;
- an envelope eliminator for recovering a carrier signal from the envelope modulated signal;
- a pulse deletion logic for receiving the carrier signal and producing a control signal in response to the binary data stream;
- and
- a current switching device for generating an output signal in response to the control signal, the output signal having a greater amplitude than the envelope modulated signal.
Dependencies are inferred from the claim text.