Adjustable radio frequency power amplifier and transmitter

Details Adjustable radio frequency power amplifier and transmitter Adjustable radio frequency power amplifier and transmitter

1999-02-08

2000-09-19

Bost, Dwayne D.

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

330124R, H01Q 1112

Patent

active

061224928

ABSTRACT:
A modulator (104) varies the duty cycle of a waveform to amplitude modulate information for transmission. A push-pull amplifier (106) in accordance with the invention, preferably constructed of CMOS devices, receives the waveform with a varying duty cycle in order to drive an antenna (108) such that a wireless transceiver can become excited by the oscillating waveform and receive the amplitude modulated signal and demodulate it to obtain the transmitted information. The power generated by the push-pull power amplifier (106) is simply increased or decreased by varying the voltage of the power supplied to the power amplifier or by varying the number of devices driving the antenna (108) in parallel.

REFERENCES:
patent: 4346384 (1982-08-01), Raab
patent: 4965530 (1990-10-01), Katz
patent: 5363072 (1994-11-01), Sakamoto et al.
patent: 5974041 (1999-10-01), Kornfeld et al.
patent: 6009324 (1999-12-01), Pravitz et al.
patent: 6037837 (2000-03-01), Miyaji et al.
patent: 6055418 (2000-04-01), Harris et al.

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